Hello everyone. I have a real head scratcher. W have an in house Exchange 2013 server installed on Windows 2012 Standard server. The client side is Windows 7 Pro with Office 2010 installed. The antivirus is AVG 2015 Business Edition and we have GFI Webmonitor installed on the network and GFI Mail Essentials on the Exchange Server. The only change we made to the network is 2 weeks ago we upgraded the GFI Webmonitor. Now to the problem. A week ago one or 2 client started getting the pop-up " Connection to Microsoft Exchange server has been lost. Outlook will restore the connection when possible" then the message "Connection to Microsoft Exchanged restored" This repeats itself every 15-20 seconds. I can ping the server by name and IP address with no packet loss. On the client side I have an event viewer error in the application log "Event 26 Connection to Microsoft Exchange server has been lost. Outlook will restore the connection when possible". no errors in the Exchange Server Logs. I have reset the TCPIP time outs on the client side with no improvement. Now gradually more and more of the clients are experiencing the same pop-ups. Trying to research this problem online is turning up a lot of irrelevant data. Any help would be greatly appreciated.

P.S. This condition does affect the mail flow between the client and server nor the server and the outside world. I have performed a continuous ping to the Exchange Server from the client when the disconnects are happening and there are no dropped packets.

Thanks George.

• Edited by jonnyreb1 Thursday, April 16, 2015 3:18 AM

Sorry but I have checked the network and it is not the network.

1. I have pinged the Exchange server from the affected computer while the disconnects are occurring and I'm not receiving any dropped packets or anything else.

2. Have already checked cables and switches, no problems there.

3. Restarted PC. No help.

4. Taking it in and out of "work offline mode" does not help.

5. Clearing the log and restarting the PC just gets me the same errors I listed.

6. Account has not expired or been suspended.

7. Creating a new profile does not help.

Thanks

George

Hi,

Please find the link which may help you.

https://support.microsoft.com/en-us/kb/2543396/

Regards

Biswajeet

Sorry, but what setting it specifies are already set that way. Also instead of 60 minutes it's 60 seconds that it is dropping and now it is the majority of the users that are affected.

Thanks

George

Sorry it took so long to get back with you. Disabling GFI makes no difference. Just so you know, both the clients and the Exchange server are inside the GFI server so the Exchange client does not go through the GFI Webmonitor to reach the Exchange server.