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OWA form based authentication and activesync issue

Posted on 2011-04-18
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Last Modified: 2012-05-11
dear sir,
we tried to enforce the OWA session time-out policy on Exchange 2003; therefore implemented the Form Based Authentication.
However, after implementing FBA, users who have mobil phones with ActiveSync. can no longer retrieve emails.
So, i read about the solution posted on MS support site:
http://support.microsoft.com/Default.aspx?kbid=817379
 
this solution requires us to setup a front end virtual directory that does not have SSL for activesync connection.  My questions are -
1.  after implementing this soluton, does it mean that all communications between mobile devices and exchange server are not encrypted?
2.  if so, is there any solution for me to apply session restrictions on OWA and also apply SSL on all connections?

thanks.

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Question by:ATRIT
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Expert Comment

by:MegaNuk3
ID: 35422008
1.) no, your devices will still use SSL if you have that ticked on the ActiveSync VD. Exchange will be talking to the exchange-oma directory not your devices
2.) see above
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Author Comment

by:ATRIT
ID: 35449638
Modified posting,

We are talking about Method2 in Microsoft article.
it is the second VD instead of front-end VD because this is
one Exchange server situation.

We had SSL enabled for both OWA and ActiveSync. Everything was
working fine before applying the Form-based Authentication (FBA).

Actual SSL configuration:
Default Web Site
     Exadmin
     Exchange
     ExchWeb                                       v  SSL
     Microsoft-Server-ActiveSync      v  SSL
     OMA
     Public
     Rpc                                                 v  SSL
     RpcWithCert                                 v  SSL
     Aspnet_client

After implementing FBA to enforce OWA time-out policy, ActiveSync
is interrupted.

It is said ActiveSync only connects with Exchange VD over port 80,
not over 443. But how does this explain we have used SSL for ActiveSync
for long time without any issue?

How does FBA interrupt ActiveSync?
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Accepted Solution

by:
MegaNuk3 earned 1500 total points
ID: 35452499
On a single server the ActiveSync directory talks to the 'Exchange' one using Windows/Kereberos authentication and when you put FBA on it turns the 'Exchange' directory into Basic auth only.

From the article you are posting:
"When you configure forms-based authentication on the Exchange Server 2003, the authentication method for the Exchange virtual directory is set to Basic authentication, and the default Domain is set to the backslash character. The Microsoft-Server-ActiveSync virtual directory can only connect to the Exchange virtual directory by using Kerberos authentication.
"
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Author Closing Comment

by:ATRIT
ID: 36965928
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