diff --git a/src/Api/AdminConsole/Controllers/OrganizationUsersController.cs b/src/Api/AdminConsole/Controllers/OrganizationUsersController.cs
index c26d67d2ba..4691518da4 100644
--- a/src/Api/AdminConsole/Controllers/OrganizationUsersController.cs
+++ b/src/Api/AdminConsole/Controllers/OrganizationUsersController.cs
@@ -199,7 +199,7 @@ public class OrganizationUsersController : Controller
         {
             var collections = await _collectionRepository.GetManyByManyIdsAsync(model.Collections.Select(a => a.Id));
             var authorized =
-                (await _authorizationService.AuthorizeAsync(User, collections, BulkCollectionOperations.ModifyAccess))
+                (await _authorizationService.AuthorizeAsync(User, collections, BulkCollectionOperations.ModifyUserAccess))
                 .Succeeded;
             if (!authorized)
             {
@@ -390,7 +390,7 @@ public class OrganizationUsersController : Controller
         var readonlyCollectionIds = new HashSet<Guid>();
         foreach (var collection in currentCollections)
         {
-            if (!(await _authorizationService.AuthorizeAsync(User, collection, BulkCollectionOperations.ModifyAccess))
+            if (!(await _authorizationService.AuthorizeAsync(User, collection, BulkCollectionOperations.ModifyUserAccess))
                 .Succeeded)
             {
                 readonlyCollectionIds.Add(collection.Id);
diff --git a/src/Api/Controllers/CollectionsController.cs b/src/Api/Controllers/CollectionsController.cs
index 7711e44220..1f320c1617 100644
--- a/src/Api/Controllers/CollectionsController.cs
+++ b/src/Api/Controllers/CollectionsController.cs
@@ -335,7 +335,8 @@ public class CollectionsController : Controller
             throw new NotFoundException("One or more collections not found.");
         }
 
-        var result = await _authorizationService.AuthorizeAsync(User, collections, BulkCollectionOperations.ModifyAccess);
+        var result = await _authorizationService.AuthorizeAsync(User, collections,
+            new[] { BulkCollectionOperations.ModifyUserAccess, BulkCollectionOperations.ModifyGroupAccess });
 
         if (!result.Succeeded)
         {
@@ -686,7 +687,7 @@ public class CollectionsController : Controller
     private async Task PutUsers_vNext(Guid id, IEnumerable<SelectionReadOnlyRequestModel> model)
     {
         var collection = await _collectionRepository.GetByIdAsync(id);
-        var authorized = (await _authorizationService.AuthorizeAsync(User, collection, BulkCollectionOperations.ModifyAccess)).Succeeded;
+        var authorized = (await _authorizationService.AuthorizeAsync(User, collection, BulkCollectionOperations.ModifyUserAccess)).Succeeded;
         if (!authorized)
         {
             throw new NotFoundException();
@@ -710,7 +711,7 @@ public class CollectionsController : Controller
     private async Task DeleteUser_vNext(Guid id, Guid orgUserId)
     {
         var collection = await _collectionRepository.GetByIdAsync(id);
-        var authorized = (await _authorizationService.AuthorizeAsync(User, collection, BulkCollectionOperations.ModifyAccess)).Succeeded;
+        var authorized = (await _authorizationService.AuthorizeAsync(User, collection, BulkCollectionOperations.ModifyUserAccess)).Succeeded;
         if (!authorized)
         {
             throw new NotFoundException();
diff --git a/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionAuthorizationHandler.cs b/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionAuthorizationHandler.cs
index fa05a71e85..c75e529b6d 100644
--- a/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionAuthorizationHandler.cs
+++ b/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionAuthorizationHandler.cs
@@ -64,61 +64,68 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
 
         var org = _currentContext.GetOrganization(_targetOrganizationId);
 
+        var authorized = false;
+
         switch (requirement)
         {
             case not null when requirement == BulkCollectionOperations.Create:
-                await CanCreateAsync(context, requirement, org);
+                authorized = await CanCreateAsync(org);
                 break;
 
             case not null when requirement == BulkCollectionOperations.Read:
             case not null when requirement == BulkCollectionOperations.ReadAccess:
-                await CanReadAsync(context, requirement, resources, org);
+                authorized = await CanReadAsync(resources, org);
                 break;
 
             case not null when requirement == BulkCollectionOperations.ReadWithAccess:
-                await CanReadWithAccessAsync(context, requirement, resources, org);
+                authorized = await CanReadWithAccessAsync(resources, org);
                 break;
 
             case not null when requirement == BulkCollectionOperations.Update:
-            case not null when requirement == BulkCollectionOperations.ModifyAccess:
             case not null when requirement == BulkCollectionOperations.ImportCiphers:
-                await CanUpdateCollectionAsync(context, requirement, resources, org);
+                authorized = await CanUpdateCollectionAsync(resources, org);
+                break;
+
+            case not null when requirement == BulkCollectionOperations.ModifyUserAccess:
+                authorized = await CanUpdateUserAccessAsync(resources, org);
+                break;
+
+            case not null when requirement == BulkCollectionOperations.ModifyGroupAccess:
+                authorized = await CanUpdateGroupAccessAsync(resources, org);
                 break;
 
             case not null when requirement == BulkCollectionOperations.Delete:
-                await CanDeleteAsync(context, requirement, resources, org);
+                authorized = await CanDeleteAsync(resources, org);
                 break;
         }
+
+        if (authorized)
+        {
+            context.Succeed(requirement);
+        }
     }
 
-    private async Task CanCreateAsync(AuthorizationHandlerContext context, IAuthorizationRequirement requirement,
-        CurrentContextOrganization? org)
+    private async Task<bool> CanCreateAsync(CurrentContextOrganization? org)
     {
         // Owners, Admins, and users with CreateNewCollections permission can always create collections
         if (org is
         { Type: OrganizationUserType.Owner or OrganizationUserType.Admin } or
         { Permissions.CreateNewCollections: true })
         {
-            context.Succeed(requirement);
-            return;
+            return true;
         }
 
         // If the limit collection management setting is disabled, allow any user to create collections
         if (await GetOrganizationAbilityAsync(org) is { LimitCollectionCreationDeletion: false })
         {
-            context.Succeed(requirement);
-            return;
+            return true;
         }
 
         // Allow provider users to create collections if they are a provider for the target organization
-        if (await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId))
-        {
-            context.Succeed(requirement);
-        }
+        return await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId);
     }
 
-    private async Task CanReadAsync(AuthorizationHandlerContext context, IAuthorizationRequirement requirement,
-        ICollection<Collection> resources, CurrentContextOrganization? org)
+    private async Task<bool> CanReadAsync(ICollection<Collection> resources, CurrentContextOrganization? org)
     {
         // Owners, Admins, and users with EditAnyCollection or DeleteAnyCollection permission can always read a collection
         if (org is
@@ -126,8 +133,7 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
         { Permissions.EditAnyCollection: true } or
         { Permissions.DeleteAnyCollection: true })
         {
-            context.Succeed(requirement);
-            return;
+            return true;
         }
 
         // The acting user is a member of the target organization,
@@ -137,20 +143,15 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
             var canManageCollections = await CanManageCollectionsAsync(resources);
             if (canManageCollections)
             {
-                context.Succeed(requirement);
-                return;
+                return true;
             }
         }
 
         // Allow provider users to read collections if they are a provider for the target organization
-        if (await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId))
-        {
-            context.Succeed(requirement);
-        }
+        return await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId);
     }
 
-    private async Task CanReadWithAccessAsync(AuthorizationHandlerContext context, IAuthorizationRequirement requirement,
-        ICollection<Collection> resources, CurrentContextOrganization? org)
+    private async Task<bool> CanReadWithAccessAsync(ICollection<Collection> resources, CurrentContextOrganization? org)
     {
         // Owners, Admins, and users with EditAnyCollection, DeleteAnyCollection or ManageUsers permission can always read a collection
         if (org is
@@ -159,8 +160,7 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
         { Permissions.DeleteAnyCollection: true } or
         { Permissions.ManageUsers: true })
         {
-            context.Succeed(requirement);
-            return;
+            return true;
         }
 
         // The acting user is a member of the target organization,
@@ -170,31 +170,23 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
             var canManageCollections = await CanManageCollectionsAsync(resources);
             if (canManageCollections)
             {
-                context.Succeed(requirement);
-                return;
+                return true;
             }
         }
 
         // Allow provider users to read collections if they are a provider for the target organization
-        if (await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId))
-        {
-            context.Succeed(requirement);
-        }
+        return await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId);
     }
 
     /// <summary>
     /// Ensures the acting user is allowed to update the target collections or manage access permissions for them.
     /// </summary>
-    private async Task CanUpdateCollectionAsync(AuthorizationHandlerContext context,
-        IAuthorizationRequirement requirement, ICollection<Collection> resources,
-        CurrentContextOrganization? org)
+    private async Task<bool> CanUpdateCollectionAsync(ICollection<Collection> resources, CurrentContextOrganization? org)
     {
         // Users with EditAnyCollection permission can always update a collection
-        if (org is
-            { Permissions.EditAnyCollection: true })
+        if (org is { Permissions.EditAnyCollection: true })
         {
-            context.Succeed(requirement);
-            return;
+            return true;
         }
 
         // If V1 is enabled, Owners and Admins can update any collection only if permitted by collection management settings
@@ -203,8 +195,7 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
                                                    organizationAbility is { AllowAdminAccessToAllCollectionItems: true };
         if (allowAdminAccessToAllCollectionItems && org is { Type: OrganizationUserType.Owner or OrganizationUserType.Admin })
         {
-            context.Succeed(requirement);
-            return;
+            return true;
         }
 
         // The acting user is a member of the target organization,
@@ -214,28 +205,32 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
             var canManageCollections = await CanManageCollectionsAsync(resources);
             if (canManageCollections)
             {
-                context.Succeed(requirement);
-                return;
+                return true;
             }
         }
 
         // Allow providers to manage collections if they are a provider for the target organization
-        if (await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId))
-        {
-            context.Succeed(requirement);
-        }
+        return await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId);
     }
 
-    private async Task CanDeleteAsync(AuthorizationHandlerContext context, IAuthorizationRequirement requirement,
-        ICollection<Collection> resources, CurrentContextOrganization? org)
+    private async Task<bool> CanUpdateUserAccessAsync(ICollection<Collection> resources, CurrentContextOrganization? org)
+    {
+        return await CanUpdateCollectionAsync(resources, org) || org?.Permissions.ManageUsers == true;
+    }
+
+    private async Task<bool> CanUpdateGroupAccessAsync(ICollection<Collection> resources, CurrentContextOrganization? org)
+    {
+        return await CanUpdateCollectionAsync(resources, org) || org?.Permissions.ManageGroups == true;
+    }
+
+    private async Task<bool> CanDeleteAsync(ICollection<Collection> resources, CurrentContextOrganization? org)
     {
         // Owners, Admins, and users with DeleteAnyCollection permission can always delete collections
         if (org is
         { Type: OrganizationUserType.Owner or OrganizationUserType.Admin } or
         { Permissions.DeleteAnyCollection: true })
         {
-            context.Succeed(requirement);
-            return;
+            return true;
         }
 
         // Check for non-null org here: the user must be apart of the organization for this setting to take affect
@@ -246,16 +241,12 @@ public class BulkCollectionAuthorizationHandler : BulkAuthorizationHandler<BulkC
             var canManageCollections = await CanManageCollectionsAsync(resources);
             if (canManageCollections)
             {
-                context.Succeed(requirement);
-                return;
+                return true;
             }
         }
 
         // Allow providers to delete collections if they are a provider for the target organization
-        if (await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId))
-        {
-            context.Succeed(requirement);
-        }
+        return await _currentContext.ProviderUserForOrgAsync(_targetOrganizationId);
     }
 
     private async Task<bool> CanManageCollectionsAsync(ICollection<Collection> targetCollections)
diff --git a/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionOperations.cs b/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionOperations.cs
index c7a01da00a..e27b00f24a 100644
--- a/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionOperations.cs
+++ b/src/Api/Vault/AuthorizationHandlers/Collections/BulkCollectionOperations.cs
@@ -6,17 +6,31 @@ public class BulkCollectionOperationRequirement : OperationAuthorizationRequirem
 
 public static class BulkCollectionOperations
 {
+    /// <summary>
+    /// Create a new collection
+    /// </summary>
     public static readonly BulkCollectionOperationRequirement Create = new() { Name = nameof(Create) };
     public static readonly BulkCollectionOperationRequirement Read = new() { Name = nameof(Read) };
     public static readonly BulkCollectionOperationRequirement ReadAccess = new() { Name = nameof(ReadAccess) };
     public static readonly BulkCollectionOperationRequirement ReadWithAccess = new() { Name = nameof(ReadWithAccess) };
+    /// <summary>
+    /// Update a collection, including user and group access
+    /// </summary>
     public static readonly BulkCollectionOperationRequirement Update = new() { Name = nameof(Update) };
     /// <summary>
-    /// The operation that represents creating, updating, or removing collection access.
-    /// Combined together to allow for a single requirement to be used for each operation
-    /// as they all currently share the same underlying authorization logic.
+    /// Delete a collection
     /// </summary>
-    public static readonly BulkCollectionOperationRequirement ModifyAccess = new() { Name = nameof(ModifyAccess) };
     public static readonly BulkCollectionOperationRequirement Delete = new() { Name = nameof(Delete) };
+    /// <summary>
+    /// Import ciphers into a collection
+    /// </summary>
     public static readonly BulkCollectionOperationRequirement ImportCiphers = new() { Name = nameof(ImportCiphers) };
+    /// <summary>
+    /// Create, update or delete user access (CollectionUser)
+    /// </summary>
+    public static readonly BulkCollectionOperationRequirement ModifyUserAccess = new() { Name = nameof(ModifyUserAccess) };
+    /// <summary>
+    /// Create, update or delete group access (CollectionGroup)
+    /// </summary>
+    public static readonly BulkCollectionOperationRequirement ModifyGroupAccess = new() { Name = nameof(ModifyGroupAccess) };
 }
diff --git a/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs b/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs
index ac94b5f514..e4831669d6 100644
--- a/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs
+++ b/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs
@@ -120,7 +120,7 @@ public class OrganizationUsersControllerTests
         sutProvider.GetDependency<IAuthorizationService>()
             .AuthorizeAsync(Arg.Any<ClaimsPrincipal>(),
                 Arg.Any<IEnumerable<Collection>>(),
-                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyAccess)))
+                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyUserAccess)))
             .Returns(AuthorizationResult.Success());
         sutProvider.GetDependency<IUserService>().GetProperUserId(Arg.Any<ClaimsPrincipal>()).Returns(userId);
 
@@ -147,7 +147,7 @@ public class OrganizationUsersControllerTests
         sutProvider.GetDependency<IAuthorizationService>()
             .AuthorizeAsync(Arg.Any<ClaimsPrincipal>(),
                 Arg.Any<IEnumerable<Collection>>(),
-                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyAccess)))
+                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyUserAccess)))
             .Returns(AuthorizationResult.Failed());
         sutProvider.GetDependency<IUserService>().GetProperUserId(Arg.Any<ClaimsPrincipal>()).Returns(userId);
 
@@ -309,13 +309,13 @@ public class OrganizationUsersControllerTests
         // Authorize the editedCollection
         sutProvider.GetDependency<IAuthorizationService>()
             .AuthorizeAsync(Arg.Any<ClaimsPrincipal>(), Arg.Is<Collection>(c => c.Id == editedCollectionId),
-                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyAccess)))
+                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyUserAccess)))
             .Returns(AuthorizationResult.Success());
 
         // Do not authorize the readonly collections
         sutProvider.GetDependency<IAuthorizationService>()
             .AuthorizeAsync(Arg.Any<ClaimsPrincipal>(), Arg.Is<Collection>(c => c.Id == readonlyCollectionId1 || c.Id == readonlyCollectionId2),
-                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyAccess)))
+                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyUserAccess)))
             .Returns(AuthorizationResult.Failed());
 
         await sutProvider.Sut.Put(organizationAbility.Id, organizationUser.Id, model);
@@ -357,7 +357,7 @@ public class OrganizationUsersControllerTests
 
         sutProvider.GetDependency<IAuthorizationService>()
             .AuthorizeAsync(Arg.Any<ClaimsPrincipal>(), Arg.Is<Collection>(c => collections.Contains(c)),
-                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyAccess)))
+                Arg.Is<IEnumerable<IAuthorizationRequirement>>(reqs => reqs.Contains(BulkCollectionOperations.ModifyUserAccess)))
             .Returns(AuthorizationResult.Failed());
 
         var exception = await Assert.ThrowsAsync<BadRequestException>(() => sutProvider.Sut.Put(organizationAbility.Id, organizationUser.Id, model));
@@ -466,7 +466,7 @@ public class OrganizationUsersControllerTests
 
             sutProvider.GetDependency<IAuthorizationService>()
                 .AuthorizeAsync(Arg.Any<ClaimsPrincipal>(), Arg.Is<Collection>(c => collections.Contains(c)),
-                Arg.Is<IEnumerable<IAuthorizationRequirement>>(r => r.Contains(BulkCollectionOperations.ModifyAccess)))
+                Arg.Is<IEnumerable<IAuthorizationRequirement>>(r => r.Contains(BulkCollectionOperations.ModifyUserAccess)))
                 .Returns(AuthorizationResult.Success());
         }
     }
diff --git a/test/Api.Test/Controllers/CollectionsControllerTests.cs b/test/Api.Test/Controllers/CollectionsControllerTests.cs
index 6155ad0f77..5aba61a4db 100644
--- a/test/Api.Test/Controllers/CollectionsControllerTests.cs
+++ b/test/Api.Test/Controllers/CollectionsControllerTests.cs
@@ -345,7 +345,9 @@ public class CollectionsControllerTests
         sutProvider.GetDependency<IAuthorizationService>().AuthorizeAsync(
                 Arg.Any<ClaimsPrincipal>(), ExpectedCollectionAccess(),
                 Arg.Is<IEnumerable<IAuthorizationRequirement>>(
-                    r => r.Contains(BulkCollectionOperations.ModifyAccess)
+                    reqs => reqs.All(r =>
+                        r == BulkCollectionOperations.ModifyUserAccess ||
+                        r == BulkCollectionOperations.ModifyGroupAccess)
                 ))
             .Returns(AuthorizationResult.Success());
 
@@ -359,8 +361,9 @@ public class CollectionsControllerTests
             Arg.Any<ClaimsPrincipal>(),
             ExpectedCollectionAccess(),
             Arg.Is<IEnumerable<IAuthorizationRequirement>>(
-                r => r.Contains(BulkCollectionOperations.ModifyAccess))
-            );
+                reqs => reqs.All(r =>
+                    r == BulkCollectionOperations.ModifyUserAccess ||
+                    r == BulkCollectionOperations.ModifyGroupAccess)));
         await sutProvider.GetDependency<IBulkAddCollectionAccessCommand>().Received()
             .AddAccessAsync(
                 Arg.Is<ICollection<Collection>>(g => g.SequenceEqual(collections)),
@@ -500,7 +503,9 @@ public class CollectionsControllerTests
         sutProvider.GetDependency<IAuthorizationService>().AuthorizeAsync(
                 Arg.Any<ClaimsPrincipal>(), ExpectedCollectionAccess(),
                 Arg.Is<IEnumerable<IAuthorizationRequirement>>(
-                    r => r.Contains(BulkCollectionOperations.ModifyAccess)
+                    reqs => reqs.All(r =>
+                        r == BulkCollectionOperations.ModifyUserAccess ||
+                        r == BulkCollectionOperations.ModifyGroupAccess)
                 ))
             .Returns(AuthorizationResult.Failed());
 
@@ -511,7 +516,9 @@ public class CollectionsControllerTests
             Arg.Any<ClaimsPrincipal>(),
             ExpectedCollectionAccess(),
             Arg.Is<IEnumerable<IAuthorizationRequirement>>(
-                r => r.Contains(BulkCollectionOperations.ModifyAccess))
+                    reqs => reqs.All(r =>
+                        r == BulkCollectionOperations.ModifyUserAccess ||
+                        r == BulkCollectionOperations.ModifyGroupAccess))
             );
         await sutProvider.GetDependency<IBulkAddCollectionAccessCommand>().DidNotReceiveWithAnyArgs()
             .AddAccessAsync(default, default, default);
diff --git a/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs b/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs
index 92063544ce..dd8bacaa9e 100644
--- a/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs
+++ b/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs
@@ -548,7 +548,9 @@ public class BulkCollectionAuthorizationHandlerTests
 
         var operationsToTest = new[]
         {
-            BulkCollectionOperations.Update, BulkCollectionOperations.ModifyAccess
+            BulkCollectionOperations.Update,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
         };
 
         foreach (var op in operationsToTest)
@@ -586,7 +588,9 @@ public class BulkCollectionAuthorizationHandlerTests
 
         var operationsToTest = new[]
         {
-            BulkCollectionOperations.Update, BulkCollectionOperations.ModifyAccess
+            BulkCollectionOperations.Update,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
         };
 
         foreach (var op in operationsToTest)
@@ -627,7 +631,9 @@ public class BulkCollectionAuthorizationHandlerTests
 
         var operationsToTest = new[]
         {
-            BulkCollectionOperations.Update, BulkCollectionOperations.ModifyAccess
+            BulkCollectionOperations.Update,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
         };
 
         foreach (var op in operationsToTest)
@@ -668,7 +674,9 @@ public class BulkCollectionAuthorizationHandlerTests
 
         var operationsToTest = new[]
         {
-            BulkCollectionOperations.Update, BulkCollectionOperations.ModifyAccess
+            BulkCollectionOperations.Update,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
         };
 
         foreach (var op in operationsToTest)
@@ -708,7 +716,9 @@ public class BulkCollectionAuthorizationHandlerTests
 
         var operationsToTest = new[]
         {
-            BulkCollectionOperations.Update, BulkCollectionOperations.ModifyAccess
+            BulkCollectionOperations.Update,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
         };
 
         foreach (var op in operationsToTest)
@@ -760,7 +770,9 @@ public class BulkCollectionAuthorizationHandlerTests
 
         var operationsToTest = new[]
         {
-            BulkCollectionOperations.Update, BulkCollectionOperations.ModifyAccess
+            BulkCollectionOperations.Update,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
         };
 
         foreach (var op in operationsToTest)
@@ -790,7 +802,9 @@ public class BulkCollectionAuthorizationHandlerTests
     {
         var operationsToTest = new[]
         {
-            BulkCollectionOperations.Update, BulkCollectionOperations.ModifyAccess
+            BulkCollectionOperations.Update,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
         };
 
         foreach (var op in operationsToTest)
@@ -813,6 +827,82 @@ public class BulkCollectionAuthorizationHandlerTests
         }
     }
 
+    [Theory, BitAutoData, CollectionCustomization]
+    public async Task CanUpdateUsers_WithManageUsersCustomPermission_Success(
+        SutProvider<BulkCollectionAuthorizationHandler> sutProvider,
+        ICollection<Collection> collections,
+        CurrentContextOrganization organization)
+    {
+        var actingUserId = Guid.NewGuid();
+
+        organization.Type = OrganizationUserType.Custom;
+        organization.Permissions = new Permissions
+        {
+            ManageUsers = true
+        };
+
+        var operationsToTest = new[]
+        {
+            BulkCollectionOperations.ModifyUserAccess,
+        };
+
+        foreach (var op in operationsToTest)
+        {
+            sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
+            sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
+
+            var context = new AuthorizationHandlerContext(
+                new[] { op },
+                new ClaimsPrincipal(),
+                collections);
+
+            await sutProvider.Sut.HandleAsync(context);
+
+            Assert.True(context.HasSucceeded);
+
+            // Recreate the SUT to reset the mocks/dependencies between tests
+            sutProvider.Recreate();
+        }
+    }
+
+    [Theory, BitAutoData, CollectionCustomization]
+    public async Task CanUpdateGroups_WithManageGroupsCustomPermission_Success(
+        SutProvider<BulkCollectionAuthorizationHandler> sutProvider,
+        ICollection<Collection> collections,
+        CurrentContextOrganization organization)
+    {
+        var actingUserId = Guid.NewGuid();
+
+        organization.Type = OrganizationUserType.Custom;
+        organization.Permissions = new Permissions
+        {
+            ManageGroups = true
+        };
+
+        var operationsToTest = new[]
+        {
+            BulkCollectionOperations.ModifyGroupAccess,
+        };
+
+        foreach (var op in operationsToTest)
+        {
+            sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
+            sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
+
+            var context = new AuthorizationHandlerContext(
+                new[] { op },
+                new ClaimsPrincipal(),
+                collections);
+
+            await sutProvider.Sut.HandleAsync(context);
+
+            Assert.True(context.HasSucceeded);
+
+            // Recreate the SUT to reset the mocks/dependencies between tests
+            sutProvider.Recreate();
+        }
+    }
+
     [Theory, CollectionCustomization]
     [BitAutoData(OrganizationUserType.Admin)]
     [BitAutoData(OrganizationUserType.Owner)]
@@ -1023,7 +1113,8 @@ public class BulkCollectionAuthorizationHandlerTests
             BulkCollectionOperations.Read,
             BulkCollectionOperations.ReadAccess,
             BulkCollectionOperations.Update,
-            BulkCollectionOperations.ModifyAccess,
+            BulkCollectionOperations.ModifyUserAccess,
+            BulkCollectionOperations.ModifyGroupAccess,
             BulkCollectionOperations.Delete,
         };