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EXCH 2010 Autodiscover keeps enabling (outlook Anywhere) Connect to MS Exchange using HTTP Proxies in Outlook

Posted on 2011-02-17
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Last Modified: 2012-06-27
Our Exchange 2010 install seems to be totally healthy but Autodiscover keeps enabling Exchange Proxy in Outlook. I will reconfigure the account and after awhile I will see username/pass prompt as Outlook is attempting to use Outlook Anywhere functions! IM GOING MAD! Someone please help!
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Question by:TheITGroup
8 Comments
 
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Expert Comment

by:ThorinO
ID: 34921811
Do you have an autodiscover A record internally that matches our Outlook Anywhere settings in Exchange?

This is happening with an internal only user right, not a laptop.
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Author Comment

by:TheITGroup
ID: 34921858
yes - I have all of the necessary A records for autodiscover - It is automatically configuring Exchange proxies for all users - Even workstations within our AD perimeter at this facility. I wouldnt mind if the settings would stay after I uncheck the box to use outlook anywhere on local Outlook clients but exchange 2010 is persistently reconfiguring proxy settings.
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LVL 9

Expert Comment

by:Dan Arseneau
ID: 34922631
Get-ExchangeCertificate -server [CAS server] | ft Subject

The value after CN= is your common name.  ie.  mail.domain.com

Get-OutlookAnywhere | ft name, externalHostName

The ExternalHostName should be the common name on your certificate. ie. mail.domain.com

Get-OutlookAnywhere | Set-OutlookAnywhere -ExternalHostname mail.domain.com

Now in Outlook settings for OA, the proxy value should auto-populate with msstd:mail.domain.com
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LVL 9

Expert Comment

by:Dan Arseneau
ID: 34922786
Another thing to note is that Outlook Providers override this setting so make sure they are NULL.

Get-OutlookProvider | ft Name, Server

You'll get 3 entries:  EXCH, EXPR, WEB.  These should return nothing for Server

If they don't,

Get-OutlookProvider | Set-OutlookProvider -Server $null
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Author Comment

by:TheITGroup
ID: 34923176
yes i realize the certificate configuration and everything would be totally perfect if I was *wanting* to use outlook anywhere on these workstations but they are currently residing in the domain level environment and the same physical LAN as the exchange server and I need them to use normal RPC functions but Autodiscover keeps overriding the manual settings I specify on OUTLOOK clients. - Although, I had manually set all three outlookproviders - maybe this is overriding my manual settings on the client side. I will set definitions for all outlookproviders to null and test in the morning.
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Expert Comment

by:tamaneri
ID: 34925674
Hopefully you find a resolution for this and can pass it along :) i'm stuck.
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Accepted Solution

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TheITGroup earned 0 total points
ID: 34930872
Well guys I found what the issue is:

Someone installed a switch at the exchange servers IP and there was an IP conflict. It was a misleading issue because the outlook clients would periodically lose connection to exchange, during traffic collisions, and the clients were freaking out and attempting to reconfigure themselves using autodiscover as a last-ditch effort.
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Author Closing Comment

by:TheITGroup
ID: 34959280
I fixed the issue
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