Loss of access to the persistent chat room

fr:Perte d acces aux persistent chat room

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Problem :

You encounter an error message on Lync / Skype for business This type :

And the "chat Room" are no longer available.

Debug :

On the server from Persistant Chat Room you have the following error at the level of the event viewer :

Microsoft Lync Server 2013, Persistent Chat could not start due to the following exception:
 at 
Microsoft.Rtc.Internal.Chat.Server.ServerCommon.Exceptions.StopServerException: CmdID: f172b345-4351-434e-af18-883a28e48034 The server could not restore db connection within the 
allowed time (00:10:00) using connection string: Data Source=lync13sql01;Initial Catalog=mgc;Integrated Security=SSPI;Failover Partner=lync13sql02. ---> 
System.Data.SqlClient.SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. 
The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
 (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) ---> System.ComponentModel.Win32Exception: The network path was not found

Solution :

It is in fact a loss of connection SQL between your server "Persistent Chat Room" and your server SQL

Reconnect (Problem réseau, Service SQL not started ), verify that a telnet on port SQL (1433 by default ) works and then restart the service RTCCHAT (Lync Server Persistent Chat)

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