diff --git a/src/Common/Commands.Common.Test/Common/ProfileClientTests.cs b/src/Common/Commands.Common.Test/Common/ProfileClientTests.cs
index 222da7747089..bc610519eaae 100644
--- a/src/Common/Commands.Common.Test/Common/ProfileClientTests.cs
+++ b/src/Common/Commands.Common.Test/Common/ProfileClientTests.cs
@@ -290,6 +290,10 @@ public void AddAzureAccountReturnsAccountWithAllSubscriptionsInCsmMode()
             Assert.True(account.GetSubscriptions(client.Profile).Any(s => s.Id == new Guid(csmSubscription1.SubscriptionId)));
         }
 
+        /// <summary>
+        /// Verify that if a user has a different identity in one tenant, the identity is not added if it has no
+        /// access to subscriptions
+        /// </summary>
         [Fact]
         public void AddAzureAccountWithImpersonatedGuestWithNoSubscriptions()
         {
@@ -326,6 +330,10 @@ public void AddAzureAccountWithImpersonatedGuestWithNoSubscriptions()
             Assert.Equal("UserA", subrdfe1.Account);
         }
 
+        /// <summary>
+        /// Verify that multiple accounts can be added if a user has different identitities in different domains, linked to the same login
+        /// Verify that subscriptions with admin access forall accounts are added
+        /// </summary>
         [Fact]
         public void AddAzureAccountWithImpersonatedGuestWithSubscriptions()
         {
@@ -346,7 +354,8 @@ public void AddAzureAccountWithImpersonatedGuestWithSubscriptions()
             ProfileClient.DataStore = dataStore;
             ProfileClient client = new ProfileClient();
 
-            var account = client.AddAccountAndLoadSubscriptions(new AzureAccount { Id = "UserA", Type = AzureAccount.AccountType.User }, AzureEnvironment.PublicEnvironments[EnvironmentName.AzureCloud], null);
+            var account = client.AddAccountAndLoadSubscriptions(new AzureAccount { Id = "UserA", Type = AzureAccount.AccountType.User }, 
+                AzureEnvironment.PublicEnvironments[EnvironmentName.AzureCloud], null);
 
             Assert.Equal("UserA", account.Id);
             Assert.Equal(1, account.GetSubscriptions(client.Profile).Count);
@@ -363,6 +372,39 @@ public void AddAzureAccountWithImpersonatedGuestWithSubscriptions()
             Assert.Equal("UserA", subrdfe1.Account);
             Assert.Equal("UserB", subGuest.Account);
         }
+        /// <summary>
+        /// Test that when account is added more than once with different capitalization, only a single account is added
+        /// and that accounts can be retrieved case-insensitively
+        /// </summary>
+        [Fact]
+        public void AddAzureAccountIsCaseInsensitive()
+        {
+            SetMocks(new[] { rdfeSubscription1, guestRdfeSubscription }.ToList(), new List<Azure.Subscriptions.Models.Subscription>(), new[] { commonTenant, guestTenant }.ToList(),
+                    (userAccount, environment, tenant) =>
+                {
+                    var token = new MockAccessToken
+                    {
+                        UserId = tenant == commonTenant.TenantId ? userAccount.Id : "USERA",
+                        AccessToken = "def",
+                        LoginType = LoginType.OrgId
+                    };
+                    userAccount.Id = token.UserId;
+                    return token;
+                });
+            MockDataStore dataStore = new MockDataStore();
+            dataStore.VirtualStore[oldProfileDataPath] = oldProfileData;
+            ProfileClient.DataStore = dataStore;
+            ProfileClient client = new ProfileClient();
+
+            var account = client.AddAccountAndLoadSubscriptions(new AzureAccount { Id = "UserA", Type = AzureAccount.AccountType.User }, 
+                AzureEnvironment.PublicEnvironments[EnvironmentName.AzureCloud], null);
+
+            var userA = client.GetAccount("UserA");
+            var secondUserA = client.GetAccount("USERA");
+            Assert.NotNull(userA);
+            Assert.NotNull(secondUserA);
+            Assert.Equal(userA.Id, secondUserA.Id);
+        }
 
         [Fact]
         public void GetAzureAccountReturnsAccountWithSubscriptions()
diff --git a/src/Common/Commands.Common/Common/ProfileClient.cs b/src/Common/Commands.Common/Common/ProfileClient.cs
index 14b612c9babb..217b84df6592 100644
--- a/src/Common/Commands.Common/Common/ProfileClient.cs
+++ b/src/Common/Commands.Common/Common/ProfileClient.cs
@@ -835,9 +835,9 @@ private AzureEnvironment MergeEnvironmentProperties(AzureEnvironment environment
             {
                 throw new ArgumentNullException("environment1");
             }
-            if (environment1.Name != environment2.Name)
+            if (!string.Equals(environment1.Name, environment2.Name, StringComparison.InvariantCultureIgnoreCase))
             {
-                throw new ArgumentException("Subscription Ids do not match.");
+                throw new ArgumentException("Environment names do not match.");
             }
             AzureEnvironment mergedEnvironment = new AzureEnvironment
             {
@@ -863,9 +863,9 @@ private AzureAccount MergeAccountProperties(AzureAccount account1, AzureAccount
             {
                 throw new ArgumentNullException("account1");
             }
-            if (account1.Id != account2.Id)
+            if (!string.Equals(account1.Id, account2.Id, StringComparison.InvariantCultureIgnoreCase))
             {
-                throw new ArgumentException("Account1 Ids do not match.");
+                throw new ArgumentException("Account Ids do not match.");
             }
             if (account1.Type != account2.Type)
             {
@@ -918,7 +918,7 @@ private IEnumerable<AzureSubscription> ListResourceManagerSubscriptions(AzureAcc
                     var tenantAccount = new AzureAccount();
                     CopyAccount(account, tenantAccount);
                     var tenantToken = AzureSession.AuthenticationFactory.Authenticate(tenantAccount, environment, tenant, password, ShowDialog.Never);
-                    if (tenantAccount.Id == account.Id)
+                    if (string.Equals(tenantAccount.Id, account.Id, StringComparison.InvariantCultureIgnoreCase))
                     {
                         tenantAccount = account;
                     }
@@ -984,7 +984,7 @@ private IEnumerable<AzureSubscription> ListServiceManagementSubscriptions(AzureA
                     var tenantAccount = new AzureAccount();
                     CopyAccount(account, tenantAccount);
                     var tenantToken = AzureSession.AuthenticationFactory.Authenticate(tenantAccount, environment, tenant, password, ShowDialog.Never);
-                    if (tenantAccount.Id == account.Id)
+                    if (string.Equals(tenantAccount.Id, account.Id, StringComparison.InvariantCultureIgnoreCase))
                     {
                         tenantAccount = account;
                     }