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Autodiscover.xml 401 error

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Autodiscover.xml 401 error - 17.May2013 5:50:43 PM

dessyboy@hotmail.com

Posts: 1
Joined: 17.May2013
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HI

I am having a hard time with an Autodiscover error on SBS 2008 running Exchange 2007.
It fails to start autodiscover.xml with a 401 error internally using Outlook 2010.
If I restart the World Wide Publishing Service it works fine for about 30-45 minutes then it starts failing again.
I'm getting the following error from the iis log when it fails:

2013-05-17 22:38:47 192.168.0.30 POST /autodiscover/autodiscover.xml - 443 - 192.168.0.116 Microsoft+Office/14.0+(Windows+NT+6.1;+Microsoft+Outlook+14.0.6129;+Pro) 401 2 5 15
2013-05-17 22:38:47 192.168.0.30 POST /autodiscover/autodiscover.xml - 443 - 192.168.0.116 Microsoft+Office/14.0+(Windows+NT+6.1;+Microsoft+Outlook+14.0.6129;+Pro) 401 1 13 0
2013-05-17 22:38:47 192.168.0.30 POST /autodiscover/autodiscover.xml - 443 - 192.168.0.116 Microsoft+Office/14.0+(Windows+NT+6.1;+Microsoft+Outlook+14.0.6129;+Pro) 401 1 64 0

Any help would be appreciated.