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Maclean...you are awesome!!<br />
<br />
It worked and all clients are up and running.<br />
<br />
Thanks so much!!
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Maclean...you are awesome!!

It worked and all clients are up and running.

Thanks so much!!

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Not a problem, happy to have been able to help out. Good luck.
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Not a problem, happy to have been able to help out. Good luck.

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I have a Lync Server 2013 running with 2013/2010 clients.<br />
<br />
As of this morning the clients will no longer sign in.<br />
<br />
It just remains in a state saying &quot;Contacting Server and Signing in&quot;<br />
<br />
The errors in the error all seem to say something about a an expired certificate but I have no clue what to look for or what to do.<br />
<br />
Any help would be appreciated.
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I have a Lync Server 2013 running with 2013/2010 clients.

As of this morning the clients will no longer sign in.

It just remains in a state saying "Contacting Server and Signing in"

The errors in the error all seem to say something about a an expired certificate but I have no clue what to look for or what to do.

Any help would be appreciated.

Lync Clients suddenly stopped signing in without errors

Instant messaging (IM) is a type of online chat that offers real-time text transmission over the Internet. A LAN messenger operates in a similar way over a local area network. More advanced instant messaging can add file transfer, clickable hyperlinks, Voice over IP, or video chat. Non-IM types of chat include multicast transmission, usually referred to as "chat rooms". Depending on the IM protocol, the technical architecture can be peer-to-peer (direct point-to-point transmission) or client-server (a central server retransmits messages from the sender to the communication device).

Chat / IM

Microsoft server applications are those applications developed specifically, but not necessarily exclusively, on the Windows Server platform. In addition to well-known products like SQL Server, Exchange, Internet Information Services (IIS), Microsoft Dynamics, Forefront, Lync and Sharepoint, they include applications like Skype, BizTalk, Hyper-V, Groove and Commerce Server. Server applications are managed with the Microsoft System Center.