Greetings!
Lync server 2013 installed with co-existence with lync 2010.
it worked ok, until the last few days.
When Lync server 2013FE is turned on, a client with lync 2013 is unable to sign-in. He receives an error that his credentials are wrong. This client is able to sign in with lync2010 client, but then he get's pop up Credentials are required and nothing seems to work.
Also Lync2010 users, who are on Lync2010fe pool, and have a fresh pc installed with office 2013 and lync2013 are starting to get credentials error when they wish to sign in with lync2013 client. If i turn off lync2013fe, thoose users are able to connect with lync2013 client.
Strange...
Any sugestions?
bostjanc