diff --git a/bitwarden_license/src/Commercial.Core/Services/ProviderService.cs b/bitwarden_license/src/Commercial.Core/Services/ProviderService.cs
index 9a5f924246..d186eb6d41 100644
--- a/bitwarden_license/src/Commercial.Core/Services/ProviderService.cs
+++ b/bitwarden_license/src/Commercial.Core/Services/ProviderService.cs
@@ -354,6 +354,12 @@ public class ProviderService : IProviderService
         var organization = await _organizationRepository.GetByIdAsync(organizationId);
         ThrowOnInvalidPlanType(organization.PlanType);
 
+        if (organization.UseSecretsManager)
+        {
+            throw new BadRequestException(
+                "The organization is subscribed to Secrets Manager. Please contact Customer Support to manage the subscription.");
+        }
+
         var providerOrganization = new ProviderOrganization
         {
             ProviderId = providerId,
diff --git a/bitwarden_license/test/Commercial.Core.Test/Services/ProviderServiceTests.cs b/bitwarden_license/test/Commercial.Core.Test/Services/ProviderServiceTests.cs
index babfa9c074..2a6e68bfb4 100644
--- a/bitwarden_license/test/Commercial.Core.Test/Services/ProviderServiceTests.cs
+++ b/bitwarden_license/test/Commercial.Core.Test/Services/ProviderServiceTests.cs
@@ -431,6 +431,23 @@ public class ProviderServiceTests
         Assert.Equal("Organization already belongs to a provider.", exception.Message);
     }
 
+    [Theory, BitAutoData]
+    public async Task AddOrganization_OrganizationHasSecretsManager_Throws(Provider provider, Organization organization, string key,
+        SutProvider<ProviderService> sutProvider)
+    {
+        organization.PlanType = PlanType.EnterpriseAnnually;
+        organization.UseSecretsManager = true;
+
+        sutProvider.GetDependency<IProviderRepository>().GetByIdAsync(provider.Id).Returns(provider);
+        var providerOrganizationRepository = sutProvider.GetDependency<IProviderOrganizationRepository>();
+        providerOrganizationRepository.GetByOrganizationId(organization.Id).ReturnsNull();
+        sutProvider.GetDependency<IOrganizationRepository>().GetByIdAsync(organization.Id).Returns(organization);
+
+        var exception = await Assert.ThrowsAsync<BadRequestException>(
+            () => sutProvider.Sut.AddOrganization(provider.Id, organization.Id, key));
+        Assert.Equal("The organization is subscribed to Secrets Manager. Please contact Customer Support to manage the subscription.", exception.Message);
+    }
+
     [Theory, BitAutoData]
     public async Task AddOrganization_Success(Provider provider, Organization organization, string key,
         SutProvider<ProviderService> sutProvider)
diff --git a/src/Core/OrganizationFeatures/OrganizationSubscriptions/AddSecretsManagerSubscriptionCommand.cs b/src/Core/OrganizationFeatures/OrganizationSubscriptions/AddSecretsManagerSubscriptionCommand.cs
index 3741148af4..52136bd1b5 100644
--- a/src/Core/OrganizationFeatures/OrganizationSubscriptions/AddSecretsManagerSubscriptionCommand.cs
+++ b/src/Core/OrganizationFeatures/OrganizationSubscriptions/AddSecretsManagerSubscriptionCommand.cs
@@ -1,8 +1,10 @@
 using Bit.Core.Entities;
 using Bit.Core.Enums;
+using Bit.Core.Enums.Provider;
 using Bit.Core.Exceptions;
 using Bit.Core.Models.Business;
 using Bit.Core.OrganizationFeatures.OrganizationSubscriptions.Interface;
+using Bit.Core.Repositories;
 using Bit.Core.Services;
 using Bit.Core.Utilities;
 
@@ -12,17 +14,21 @@ public class AddSecretsManagerSubscriptionCommand : IAddSecretsManagerSubscripti
 {
     private readonly IPaymentService _paymentService;
     private readonly IOrganizationService _organizationService;
+    private readonly IProviderRepository _providerRepository;
+
     public AddSecretsManagerSubscriptionCommand(
         IPaymentService paymentService,
-        IOrganizationService organizationService)
+        IOrganizationService organizationService,
+        IProviderRepository providerRepository)
     {
         _paymentService = paymentService;
         _organizationService = organizationService;
+        _providerRepository = providerRepository;
     }
     public async Task SignUpAsync(Organization organization, int additionalSmSeats,
         int additionalServiceAccounts)
     {
-        ValidateOrganization(organization);
+        await ValidateOrganization(organization);
 
         var plan = StaticStore.GetSecretsManagerPlan(organization.PlanType);
         var signup = SetOrganizationUpgrade(organization, additionalSmSeats, additionalServiceAccounts);
@@ -55,7 +61,7 @@ public class AddSecretsManagerSubscriptionCommand : IAddSecretsManagerSubscripti
         return signup;
     }
 
-    private static void ValidateOrganization(Organization organization)
+    private async Task ValidateOrganization(Organization organization)
     {
         if (organization == null)
         {
@@ -83,5 +89,12 @@ public class AddSecretsManagerSubscriptionCommand : IAddSecretsManagerSubscripti
         {
             throw new BadRequestException("No subscription found.");
         }
+
+        var provider = await _providerRepository.GetByOrganizationIdAsync(organization.Id);
+        if (provider is { Type: ProviderType.Msp })
+        {
+            throw new BadRequestException(
+                "Organizations with a Managed Service Provider do not support Secrets Manager.");
+        }
     }
 }
diff --git a/src/Core/Services/Implementations/OrganizationService.cs b/src/Core/Services/Implementations/OrganizationService.cs
index 10dc2a2056..2388faded2 100644
--- a/src/Core/Services/Implementations/OrganizationService.cs
+++ b/src/Core/Services/Implementations/OrganizationService.cs
@@ -410,6 +410,11 @@ public class OrganizationService : IOrganizationService
         var secretsManagerPlan = StaticStore.SecretManagerPlans.FirstOrDefault(p => p.Type == signup.Plan);
         if (signup.UseSecretsManager)
         {
+            if (provider)
+            {
+                throw new BadRequestException(
+                    "Organizations with a Managed Service Provider do not support Secrets Manager.");
+            }
             ValidateSecretsManagerPlan(secretsManagerPlan, signup);
         }
 
diff --git a/test/Core.Test/OrganizationFeatures/OrganizationSubscriptionUpdate/AddSecretsManagerSubscriptionCommandTests.cs b/test/Core.Test/OrganizationFeatures/OrganizationSubscriptionUpdate/AddSecretsManagerSubscriptionCommandTests.cs
index a09500cf67..ec83fa1022 100644
--- a/test/Core.Test/OrganizationFeatures/OrganizationSubscriptionUpdate/AddSecretsManagerSubscriptionCommandTests.cs
+++ b/test/Core.Test/OrganizationFeatures/OrganizationSubscriptionUpdate/AddSecretsManagerSubscriptionCommandTests.cs
@@ -1,9 +1,12 @@
 using Bit.Core.Entities;
+using Bit.Core.Entities.Provider;
 using Bit.Core.Enums;
+using Bit.Core.Enums.Provider;
 using Bit.Core.Exceptions;
 using Bit.Core.Models.Business;
 using Bit.Core.Models.StaticStore;
 using Bit.Core.OrganizationFeatures.OrganizationSubscriptions;
+using Bit.Core.Repositories;
 using Bit.Core.Services;
 using Bit.Core.Utilities;
 using Bit.Test.Common.AutoFixture;
@@ -127,6 +130,25 @@ public class AddSecretsManagerSubscriptionCommandTests
         await VerifyDependencyNotCalledAsync(sutProvider);
     }
 
+    [Theory]
+    [BitAutoData]
+    public async Task SignUpAsync_ThrowsException_WhenOrganizationIsManagedByMSP(
+        SutProvider<AddSecretsManagerSubscriptionCommand> sutProvider,
+        Organization organization,
+        Provider provider)
+    {
+        organization.UseSecretsManager = false;
+        organization.SecretsManagerBeta = false;
+        provider.Type = ProviderType.Msp;
+        sutProvider.GetDependency<IProviderRepository>().GetByOrganizationIdAsync(organization.Id).Returns(provider);
+
+        var exception = await Assert.ThrowsAsync<BadRequestException>(
+            () => sutProvider.Sut.SignUpAsync(organization, 10, 10));
+
+        Assert.Contains("Organizations with a Managed Service Provider do not support Secrets Manager.", exception.Message);
+        await VerifyDependencyNotCalledAsync(sutProvider);
+    }
+
     private static async Task VerifyDependencyNotCalledAsync(SutProvider<AddSecretsManagerSubscriptionCommand> sutProvider)
     {
         await sutProvider.GetDependency<IPaymentService>().DidNotReceive()
diff --git a/test/Core.Test/Services/OrganizationServiceTests.cs b/test/Core.Test/Services/OrganizationServiceTests.cs
index 4907efafcb..a4974d39af 100644
--- a/test/Core.Test/Services/OrganizationServiceTests.cs
+++ b/test/Core.Test/Services/OrganizationServiceTests.cs
@@ -263,6 +263,22 @@ public class OrganizationServiceTests
         );
     }
 
+    [Theory]
+    [BitAutoData(PlanType.EnterpriseAnnually)]
+    public async Task SignUp_SM_Throws_WhenManagedByMSP(PlanType planType, OrganizationSignup signup, SutProvider<OrganizationService> sutProvider)
+    {
+        signup.Plan = planType;
+        signup.UseSecretsManager = true;
+        signup.AdditionalSeats = 15;
+        signup.AdditionalSmSeats = 10;
+        signup.AdditionalServiceAccounts = 20;
+        signup.PaymentMethodType = PaymentMethodType.Card;
+        signup.PremiumAccessAddon = false;
+
+        var exception = await Assert.ThrowsAsync<BadRequestException>(() => sutProvider.Sut.SignUpAsync(signup, true));
+        Assert.Contains("Organizations with a Managed Service Provider do not support Secrets Manager.", exception.Message);
+    }
+
     [Theory]
     [BitAutoData]
     public async Task SignUpAsync_SecretManager_AdditionalServiceAccounts_NotAllowedByPlan_ShouldThrowException(OrganizationSignup signup, SutProvider<OrganizationService> sutProvider)