Hi there,
a few days ago our Skype for Business 2015 server denied any login attempts. Turned out the default certificate expired and I had to request and assign a new one. We're using our own certificate authority.
After the renewal (and assignment), which showed no errors, I restarted the FE. But still, no client can login to this server.
Client log says:
06/21/2017|14:42:23.918 4558:36AC ERROR :: SECURE_SOCKET: negotiation failed: 80092012, principal name: [server.company.local]
06/21/2017|14:42:23.921 4558:4730 ERROR :: CSIPTransportLayerSecurity::OnTlsNegotiationComplete (1C5477C8) failed with 0x80ee0069. Raising OnConnect with the same error
06/21/2017|14:42:23.921 4558:4730 ERROR :: CSIPClientConnection::OnConnect (80ee0069) this: 0E708FF0
I already tried to clear the client cache and client login credentials, but the problem persists.
Any hint is appreciated! Thanks in advance.
