Hello Everyone,
We are experience a very strange issue with our Exchange Server, we are currently running Exchange Server 2013 and our clients are Outlook 2007, 2010 and 2013.
The clients are randomly disconnecting for random periods of time; all clients will do so. If the user closes outlook and re-opens it generally will reconnect and no issues. If the user is using Outlook 2013 it seems often it will reconnect by itself without requiring a restart of the client.
During a disconnect on the client computers; if I look at the connection status it will show a random number of connections ranging from 8 to 16 connections to the exchange server. Typically when outlook is showing disconnected 2-4 of these connections will say trying to connect; or disconnected.
The server itself is still running and users can go to Web Mail and still have access to their emails during these disconnects. Stranger yet is when users get disconnected it is not all users at the same time, one user may get disconnected and reconnected and than 20 minutes later someone else will get disconnected.
It seems to be a connection limitation on the server but I have increased the tcp/ip max connections allowed as well as tried some different time out settings on the server. Neither fixed the issue. Any help to solve this would be appreciated, I am fairly new to Exchange administration so you may need some patience with me as some tasks I may need more help to complete than others. We have been fighting this issue since the initial upgrade of the server from 2007 to 2013. During the upgrade we did find out that the previous server had been removed incorrectly and there was much clean up required and it could be related currently. Although I am not 100% sold that this is the reason for the random disconnects.
Cheers,
Johnathan McFarlane
Systems Analyst