Dear All . 

we have exchange server 2013 RTM currently single server and when trying to access out from out side we are getting ERR_CONNECTION_CLOSED and sometimes it is working and sometimes it is not .

also sometimes from IE Browser it is working and from Google Chrome it is not !!

is this something related to the Certificate ? 

where to start troubleshoot !!

update exchange to CU7 will solve the issue !

owa working internally and no problem 

also recently we have renews the SAN Certificate .

• Edited by JavaHeart Tuesday, June 16, 2015 10:29 AM

Mcafee has an SSL content inspection option. Can you disable this temporarily and see if that improves the connection ? 

"If your particular SSL application doesn't work when SSL content inspection is configured, it may be incompatible. Use passthrough instead for the SSL application. To use passthrough, configure a new SSL policy rule for the endpoints in the audit message with an action of No Decryption, and then place that rule above your Re-encrypt rule."

• Edited by Knob Country Tuesday, June 16, 2015 2:24 PM

hi B0ndoo7

i am getting ERR_EONNECION_CLOSED on the web browse when trying to browse , yes we have renewed the SAN Certificate recently from thawte  , i don't think i can revert back to old certificate since the new one if now installed on exchange server 

this issue is affecting all users 

As long as the old cert wasn't removed from your Exchange server, you can still edit it's properties and check the boxes in the 'services' tab for at least IIS.  It might require an IISRESET.

Did you check IIS and Httperr logs to find-out what is happening ? Also you can use log parser studio to find out correct logs.

- Default location of logs - 

C:\Windows\system32\LogFiles\Httperr
C:\inetpub\logs\LogFiles

http://blogs.technet.com/b/exchange/archive/2013/06/17/log-parser-studio-2-2-is-now-available.aspx