Can't connect to Office Communication Server through Unified Communications API

Question

I am trying to connect to Office Communication Server using the Unified Communications Managed API. I have tried my user and a fresh user enabled for OCS. Both account can successfully log into the Office Communicator client, but fail using the API. When creating the network credential, if I pass in the username in the form domain\username, I get this error:

SupportedAuthenticationProtocols=Ntlm, Kerberos
Realm=SIP Communications Service
FailureReason=InvalidCredentials
ErrorCode=-2146893044
Microsoft.Rtc.Signaling.AuthenticationException: The log on was denied. Check that the proper credentials are being used and the account is active. ---> Microsoft.Rtc.Internal.Sip.AuthException: NegotiateSecurityAssociation failed, error: - 2146893044

If I leave off the domain in the username I this error:

ResponseCode=404 ResponseText=Not Found
DiagnosticInformation=ErrorCode=4005,Source=OCS.mydomain.com,Reason=Destination URI either not enabled for SIP or does not exist

Answer 1

Turns out this was an oversight on my part. Our AD domain and communicator domain are different, I had assumed they were the same.

The network credential is domain\username, and the sip address should have been sip:[email protected], I was using sip:[email protected].

Answer 2

I am getting error NegotiateSecurityAssociation failed, error: -2146893039, not sure I am getting this?

I have enable TLS between host of UCMA app and OCS server. but UCMA app is in different domain? does it matter? if I call the same method and same credentail from server itself, it just work fine.. any help in this area will be helpful.

thanks Manish

Answer 3

Hello, this is exactly I am doing what you describe in fact I picked the code from samples. this code is working if I try to setup connection from Server itself. but i think coz my client machine is in different domain that why its causing the issue.

any other suggestion. thanks manish

        //Initalize and register the endpoint, using the credentials of the user the application will be acting as.
        UserEndpointSettings userEndpointSettings = new UserEndpointSettings(userURI, userServer);
        userEndpointSettings.Credential = credential;
        UserEndpoint userEndpoint = new UserEndpoint(collabPlatform, userEndpointSettings);
        userEndpoint.BeginEstablish(EndEndpointEstablish, userEndpoint);