Hi,

I am using EPiServer CMS 10.3.1 hosted on Azure Cloud. We have used IAM for authentication and autharization and then getting claim.

I am getting error "The parameter 'username' must not contain commas." for user while logging in.

[ArgumentException: The parameter 'username' must not contain commas.
Parameter name: username]
   System.Web.Providers.DefaultMembershipProvider.GetUser(String username, Boolean userIsOnline) +184
   EPiServer.Security.MultiplexingMembershipProvider.FindMembershipUser(String username) +118
   EPiServer.Security.MultiplexingMembershipProvider.get_CurrentMembershipUser() +34
   EPiServer.Security.MultiplexingMembershipProvider.get_CurrentProvider() +31
   EPiServer.Security.MultiplexingRoleProvider.get_CurrentProvider() +61
   EPiServer.Security.MultiplexingRoleProvider.GetRolesForUser(String username) +26
   System.Web.Security.RolePrincipal.GetRoles() +215
   System.Web.Security.d__4.MoveNext() +58
   System.Security.Claims.d__51.MoveNext() +253
   System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +190
   System.Linq.d__63`1.MoveNext() +60
   System.Collections.Generic.HashSet`1.UnionWith(IEnumerable`1 other) +140
   System.Collections.Generic.HashSet`1..ctor(IEnumerable`1 collection, IEqualityComparer`1 comparer) +125
   EPiServer.Security.Internal.VirtualRoleToClaimConverter.AddClaims(IPrincipal principal) +597
   EPiServer.Security.Internal.VirtualRoleEventHandler.AddClaims_PostAuthenticateRequest(Object sender, EventArgs e) +57
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +141
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

As users are stored from different system, how can I allow "," or "-" in the username, or is it not possible in Membership provider.

Please let me know if anyone knows solution, that will be a great help.

Thanks,
Sanket Mahimkar