OWA fails with FBA off but OMA works and vice versa

If Forms Based Authentication is off, then OWA fails but OMA works. When I enable FBA, OWA works and OMA fails. Obviously I need both to work but can't seem to noodle out the correct combination. I have Require SSL unticked and Basic/Windows Authentication ticked under the Virtual Directories in IIS. All was working fine a couple of days ago, it just started failing for some reason. Any insight would be appreciated.
SCSSpikeAsked:
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SCSSpikeAuthor Commented:
Update: Currently OMA is functioning and OWA is giving a proper login screen and then after credentials are ented, displays a HTTP 500 error. I posted that very issue as a question on Friday and the fix turned out to be turning on the Forms Based Authentication and setting the compression to High. I was extremely glad when I saw that this indeed fixed the OWA HTTP500 error, but what I did not realize until late last night was that when FBA was enabled, it broke OMA.

Thankfully it is the weekend and users are not really needing the OWA, so I have left FBA unchecked to keep OMA alive. Any help would be appreciated.
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Shreedhar EtteCommented:
Hi,

Refer this article:
http://support.microsoft.com/kb/817379

Hope this helps,
Shree
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MegaNuk3Commented:
Simply re-running the CEICW on SBS should fix this.

Otherwise refer to the article Shree has posted and go down to the section where it mentions the exchange-oma directory and the ExchangeVDir registry setting.

After running the CEICW, confirm everything is fine, if not then confirm your settings are as per the article.
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SCSSpikeAuthor Commented:
Hi, thanks for the tips. Everything seems to have gone well after following the KB articles steps but now a new problem has come up. OMA is working fine as well as the normal functions of Exchange, local Outlook connections etc. but now when attempting to login to OWA I receive a 440 Login Timeout error message. I was not getting this error before so the issue has changed. Any idea as to what may have caused this behavior?
Thanks.
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MegaNuk3Commented:
turn off FBA press apply then turn it back on again
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MegaNuk3Commented:
make sure "require SSL" is unticked on the Exchange-OMA directory
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SCSSpikeAuthor Commented:
Cycled the FBA and verified that SSL was not enabled on the Exchange-OMA directory. Still getting the 440 error on OWA and OMA is still working.
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SCSSpikeAuthor Commented:
Hi, all fixed, the issue was due to the IUSR password not being in synch with ADUC. thanks for all the help, it has been a very long weekend.
Cheers.
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MegaNuk3Commented:
thanks for the update, glad it is working again.
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