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OWA LOGIN SCREEN

Posted on 2006-11-07
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Last Modified: 2010-03-06
Something very strange has just started happening to some of my users that use OWA for email access.  I am running Exchange 2003.  When a user logs into their email account through the browser they see their mail fine. However, as soon as they try and open an email, or go to contacts, or calendar, or options a new browser window appears that displays the original OWA logon screen.  If they log on to that screen the option they selected appears.  

It happens if I login with premier or basic options.

It is not happening for all my email uses.  For example, I can logon with a test account I have with no problems.  I can navigate through emails, contacts and options with no problems.  
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Question by:carric01
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13 Comments
 
LVL 31

Expert Comment

by:LeeDerbyshire
ID: 17897983
Have a look at your ExchWeb Virtual Directory in IIS Manager.  Does it still have Anonymous Access enabled?
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Author Comment

by:carric01
ID: 17900842
Yes Anonymous Access is enabled on the ExchWeb VD
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LVL 31

Expert Comment

by:LeeDerbyshire
ID: 17901272
How many Exchange servers do you have?  Is it a FE/BE setup?
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Author Comment

by:carric01
ID: 17901293
I have one back end exchange server.
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LVL 31

Expert Comment

by:LeeDerbyshire
ID: 17901314
How many Exchange Virtual Servers/Directories (as created in ESM) are on the BE?
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Author Comment

by:carric01
ID: 17901442
There is one single Server/Directory
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LVL 31

Expert Comment

by:LeeDerbyshire
ID: 17901669
Is Forms-based Authentication enabled on the BE Virtual Server?
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Author Comment

by:carric01
ID: 17901696
Yes it is enabled with the compression set to high
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LVL 31

Accepted Solution

by:
LeeDerbyshire earned 500 total points
ID: 17901744
FE/BE OWA doesn't work with FBA enabled on the BE server.  The BE must have both Basic and Integrated auth enabled in ESM, and SSL not required in IIS Manager.  If you want to use FBA, then it can only be enabled on the FE.
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Author Comment

by:carric01
ID: 17902086
FBA has been enabled on this server since day one along with SSL required.  I have had this server running that way for over a year with no issues.  It seems as though this issue started happening after I upgraded to Service pack 2 for Exchange
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LVL 31

Expert Comment

by:LeeDerbyshire
ID: 17902121
I can't explain why it has ever worked for some users - I can only assume that were going direct to the BE server to use OWA with https://beserver/exchange , instead of going through the FE server.  I can assure you, though, that anyone going to the FE server to use OWA will have problems if FBA is enabled on the BE server.
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