diff --git a/src/Api/Public/Controllers/GroupsController.cs b/src/Api/Public/Controllers/GroupsController.cs
index c43f345dd5..4b67b9e61c 100644
--- a/src/Api/Public/Controllers/GroupsController.cs
+++ b/src/Api/Public/Controllers/GroupsController.cs
@@ -139,6 +139,29 @@ namespace Bit.Api.Public.Controllers
             return new JsonResult(response);
         }
 
+        /// <summary>
+        /// Update a group's members.
+        /// </summary>
+        /// <remarks>
+        /// Updates the specified group's member associations.
+        /// </remarks>
+        /// <param name="id">The identifier of the group to be updated.</param>
+        /// <param name="model">The request model.</param>
+        [HttpPut("{id}/member-ids")]
+        [ProducesResponseType((int)HttpStatusCode.OK)]
+        [ProducesResponseType(typeof(ErrorResponseModel), (int)HttpStatusCode.BadRequest)]
+        [ProducesResponseType((int)HttpStatusCode.NotFound)]
+        public async Task<IActionResult> PutMemberIds(Guid id, [FromBody]UpdateMemberIdsRequestModel model)
+        {
+            var existingGroup = await _groupRepository.GetByIdAsync(id);
+            if(existingGroup == null || existingGroup.OrganizationId != _currentContext.OrganizationId)
+            {
+                return new NotFoundResult();
+            }
+            await _groupRepository.UpdateUsersAsync(existingGroup.Id, model.MemberIds);
+            return new OkResult();
+        }
+
         /// <summary>
         /// Delete a group.
         /// </summary>
diff --git a/src/Api/Public/Controllers/MembersController.cs b/src/Api/Public/Controllers/MembersController.cs
index 76c078e545..93ed8e1a7d 100644
--- a/src/Api/Public/Controllers/MembersController.cs
+++ b/src/Api/Public/Controllers/MembersController.cs
@@ -159,6 +159,29 @@ namespace Bit.Api.Public.Controllers
             return new JsonResult(response);
         }
 
+        /// <summary>
+        /// Update a member's groups.
+        /// </summary>
+        /// <remarks>
+        /// Updates the specified member's group associations.
+        /// </remarks>
+        /// <param name="id">The identifier of the member to be updated.</param>
+        /// <param name="model">The request model.</param>
+        [HttpPut("{id}/group-ids")]
+        [ProducesResponseType((int)HttpStatusCode.OK)]
+        [ProducesResponseType(typeof(ErrorResponseModel), (int)HttpStatusCode.BadRequest)]
+        [ProducesResponseType((int)HttpStatusCode.NotFound)]
+        public async Task<IActionResult> PutGroupIds(Guid id, [FromBody]UpdateGroupIdsRequestModel model)
+        {
+            var existingUser = await _organizationUserRepository.GetByIdAsync(id);
+            if(existingUser == null || existingUser.OrganizationId != _currentContext.OrganizationId)
+            {
+                return new NotFoundResult();
+            }
+            await _organizationService.UpdateUserGroupsAsync(existingUser, model.GroupIds);
+            return new OkResult();
+        }
+
         /// <summary>
         /// Delete a member.
         /// </summary>
diff --git a/src/Core/Models/Api/Public/Request/UpdateGroupIdsRequestModel.cs b/src/Core/Models/Api/Public/Request/UpdateGroupIdsRequestModel.cs
new file mode 100644
index 0000000000..a3fc7df5d3
--- /dev/null
+++ b/src/Core/Models/Api/Public/Request/UpdateGroupIdsRequestModel.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+
+namespace Bit.Core.Models.Api.Public
+{
+    public class UpdateGroupIdsRequestModel
+    {
+        /// <summary>
+        /// The associated group ids that this object can access.
+        /// </summary>
+        public IEnumerable<Guid> GroupIds { get; set; }
+    }
+}
diff --git a/src/Core/Models/Api/Public/Request/UpdateMemberIdsRequestModel.cs b/src/Core/Models/Api/Public/Request/UpdateMemberIdsRequestModel.cs
new file mode 100644
index 0000000000..c1bf602c0b
--- /dev/null
+++ b/src/Core/Models/Api/Public/Request/UpdateMemberIdsRequestModel.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+
+namespace Bit.Core.Models.Api.Public
+{
+    public class UpdateMemberIdsRequestModel
+    {
+        /// <summary>
+        /// The associated member ids that have access to this object.
+        /// </summary>
+        public IEnumerable<Guid> MemberIds { get; set; }
+    }
+}