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As I talked about in a previous post, a common solution for companies running Exchange is to use redirection to dump all incoming user request to the OWA sub directory on the CAS server.  HTTP to HTTPS redirection is also commonly implemented.  Recently I found a gotcha to this configuration.  When a user connected with Outlook Anywhere does a Send/Receive, it will hang on the Offline Address Book, sometimes permanently until either the task is cancelled or Outlook is restarted.

 

After a long while of troubleshooting this issue, I finally lucked on to the answer when I did a browse to the OAB.xml file on port 80 from the console in IIS and received a 500 error.  After digging around for the reason I was locked out, I finally found why.

 

When you enable redirection with the HTTP redirection feature in IIS 7, it places a web.config file in every sub directory of the default web site.  This is the reason you have to go disable redirection on all the sub directories after turning it on at the DWS.  For some reason, the web.config file in the OAB subdirectory was the only one that authenticated users did not have read access to. To fix the issue, I granted authenticated users read rights to the web.config file.

Note: The OAB subdirectory is located at

C:\Program Files\Microsoft\Exchange Server\Client Access\OAB

Posted on Friday, February 5, 2010 11:11 PM MS Exchange 2007 | Back to top


Comments on this post: Offline Address Book problems with Exchange 2007 and Outlook Anywhere

# re: Offline Address Book problems with Exchange 2007 and Outlook Anywhere
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Thank you for posting this. Saved me a huge headach early in the morning. I appreciate people like you.
Left by Mike Stahlman on Aug 10, 2010 8:08 AM

# re: Offline Address Book problems with Exchange 2007 and Outlook Anywhere
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Thank You!!!
Left by Exchange on Oct 27, 2010 6:30 PM

# re: Offline Address Book problems with Exchange 2007 and Outlook Anywhere
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I've been struggling to find a solution for this problem, and was hopeful when I came across this. The thing is, there is no web.config file in the OAB dir. There are, however, one in the other dirs (i.e. EWS, OWA). Could the absense of that file be the cause?
Left by Mailmaven on Jul 20, 2011 11:14 AM

# re: Offline Address Book problems with Exchange 2007 and Outlook Anywhere
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I thought I found a solution here. However, the OAB folder does not have a web.config file. The other folders do (EWS, OWA). Could that be the problem? Not sure how one would get created.
Left by Brenda P on Jul 20, 2011 12:29 PM

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