Lync2013 + Pidgin Error:Web ticket request I am running pidgin + sipe plugin.Below the settings Server:blank Connection type:auto User Agent:UCCAPI/15.0.4420.1017 OC/15.0.4420.1017 A uthentication scheme: TLS-DSK When I enable the account I get this error Web ticket request to failed Any idea why?

I met exactly the same problem as yours, the solution is getting the Lync server certificate and root certificate of it. In the Pidgin menu bar, select Tools → Certificates, and import all these certificates.