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OWA error after Exchange migration from 2007 to 2010 - A server configuration change is temporarily preventing access to your account.

Posted on 2013-10-28
Medium Priority
Last Modified: 2014-06-29
Hi everyone.

I migrated an SBS 2008 server to SBS 2011 but the OWA isn't working.

The login screen comes up with the correct OWA 2010 login page, but when I put in the username and password, I get this error:

A server configuration change is temporarily preventing access to your account. Please close all Web browser windows and try again in a few minutes. If the problem continues, contact your helpdesk.

Email is still flowing to mobile devices and is working fine with Outlook on all the computers in the office.

Even if I go to https://new_server.local/owa from an internal computer, I get exactly the same result.

What am I missing?  Is it a setting in IIS?
Question by:mikem2k
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LVL 12

Expert Comment

by:Satish Auti
ID: 39607818

Did you try to IISreset?
LVL 12

Expert Comment

by:Satish Auti
ID: 39607831
Have installd any hotfixes after migration. if yes,  then you need run casupdate once....

To fix this issue you have to run updatecas.ps1 in the Exchange Management Shell. You can find the script in C:\Program Files\Microsoft\Exchange Server\V14\Bin .

Expert Comment

ID: 39607869
try to restart this service

Microsoft Forms Based Authentication
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Author Comment

ID: 39608260
Thanks for the suggestions so far.

I restarted IIS via issreset, restarted Forms Based Authentication and restarted the server but that didn't help.

I didn't manually install any hotfixes, just updates.

I just tried to run updatecas.ps1 from an elevated Powershell, but that didn't help either.

Next step?

Expert Comment

ID: 39608268
what was the previous version and present version of IIS ?
LVL 31

Expert Comment

ID: 39608421
Does it make any difference if you choose the 'light' GUI when you log in?

Expert Comment

ID: 39608429
1.  A common cause is if the web browser becomes confused about which server to contact to find the needed mailbox; if this is the problem it can be fixed by clearing the browser's cache of temporary files.
    See How do I clear the browser cache?
    Another cause can be if MIT's Exchange system has an old configuration for the affected user's mailboxes, people who have not logged into OWA since before the Oct 2011 upgrade are particularly susceptible to this problem.

2. please follow this EE link

please share the output

Author Comment

ID: 39609515
I tried clearing the cache many times and it didn't help.

IIS on the old server was 7.0, but I stopped IIS services after migration (I tried restarting but it made no difference.)  IIS on the new server is 7.5

We have only one site and one active SBS server; the EE link above references 2 sites and 4 servers and furthermore states they can open https://localhost/owa internally and everything works fine.  

We get the same error opening https://localhost/owa or https://new_server/owa from a local computer.  

However, opening https://old_server/owa with IIS turned back on at the old server brings up the Exchange 2007 OWA login page and the login works fine (though of course all the email there precedes the migration)

Accepted Solution

mikem2k earned 0 total points
ID: 39623694
I ran the Reset Virtual Directory under Client Access in EMC and that resolved the problem.

Author Closing Comment

ID: 39635525
This was the only step that resolved the issue.  I found the answer after performing further research on my own.

Expert Comment

ID: 40166203
iisreset also did the trick for me.

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