Hi,
Our lync 2010 can't expand contact group and new lync user can't find anyone, I checked event log, there are a lot of same event ID 4096:
An unhandled exception was encountered in WebTicketService service.
Exception Details. System.Security.Cryptography.CryptographicException: Invalid provider type specified.
at Microsoft.Rtc.Internal.WebServicesAuthFramework.AuthUtitlities.FindAndValidateTokenTransferCert(String certSN, String certIssuer)
at Microsoft.Rtc.Internal.WebServicesAuthFramework.WebTicketKeyStore.InitSigningCredentials()
at Microsoft.Rtc.Internal.WebServicesAuthFramework.WebTicketKeyStore.GetSigningCredentials()
at Microsoft.Rtc.Internal.WebTicketService.WebTicketService.GenerateSamlToken(OCSIdentity ocsId, String sipuriRenew, RequestSecurityToken rst, SecurityKeyIdentifier proofKeyIdentifier, EndpointAddress audienceAddress)
at Microsoft.Rtc.Internal.WebTicketService.WebTicketService.DoIssueToken(Message rstMessage)
at SyncInvokeIssueToken(Object , Object[] , Object[] )
at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)
Cause: Application error. Please look through the exception details for more information.
Resolution:
Restart the server. If the problem persists contact product support.
I tried to restart and Invoke-CsManagementStoreReplication, still didn't work.