0006TL_ERROR(TF_COMPONENT)::(CollaborationApi,SipTransactionAsyncResult`1.ProcessAuthenticationRequiredResponse) <SipSubscription_56666602||SipSubscribeTransactionAsyncResult_58247484> There was an authentication problem. [sip:l10-user01@domain.com;epid=3BA5C83F52] Exception: Exception: Microsoft.Rtc.Internal.Sip.AuthException> ErrorCode: -2146233088> Message: TLSDSK AcquireCredential return error> StackTrace: at Microsoft.Rtc.Internal.Sip.SipAuthentication.AcquireTLSDSKCredentials(String authProtocolString, String sipInstance, WebTicket webTicket, String sessionId) at Microsoft.Rtc.Signaling.SipTransactionAsyncResult`1.ProcessAuthenticationRequiredResponse(SipResponse response)
Such error is logged in Lync Web App while trying to join the conference by URL. At the same time Lync 2010 Client works well. The source of connection does not matter - both external and internal connections behave the same. The Lync Web App itself just produces the "An error occurred while trying to join the conference. Try again" text.
At the same time, FE server records the warning:
Log Name: Lync Server
Source: LS UserPin Service
Date: 4/17/2014 4:37:33 AM
Event ID: 47055
Task Category: (1044)
Level: Warning
Keywords: Classic
User: N/A
Computer: L10-FE.domain.com
Description:
GetAndPublish web service failed due to an internal error
Request Details - Entity: [l10-user01@domain.com], Device Id: [{c5e12ec3-c2f1-52fd-ad8d-496b46f5f709}], Authenticated User: [sip:l10-user01@domain.com].
Cause: This is an unexpected failure
Resolution:
Re-start the web server. If you see this error continuously, examine the server traces and contact product support.As workaround we can disable the certificate authentication according to the article http://blogs.technet.com/b/nexthop/archive/2012/08/20/certificate-authentication-in-lync-server-2010-and-enterprise-pki.aspx, and then Lync Web App can join meetings.
Any ideas about the root cause of the problem?
We are using Lync 2010 Standard coexisted with Lync 2013 Enterprise. Topology includes Standard FE and single Edge server. All firewalls between the servers are disabled, NAT is not used.