Symptoms
When you use the Microsoft Exchange Post Office Protocol 3 (POP3) service to log on your email client in a Microsoft Exchange Server 2013 environment, the connection stops and then reestablishes frequently. During the disconnection time, new emails can't be downloaded.
Cause
This issue occurs because the proxy session times out during lock contention.
Resolution
To fix this issue, install Cumulative Update 12 or a later cumulative update for Exchange Server 2013.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
