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Exchange 2013 OWA/ECP Error 500

By: donovan
21-10-2013
Active Directory, Exchange, Microsoft

After I installed Exchange 2013 and tried to access either OWA or ECP on it, I kept getting Error 500.  Looking at the httpproxy logs, I saw this: The unhandled exception was: System.Security.Cryptography.CryptographicException: Invalid provider type specified.

Turns out Exchange doesn’t like the key provider, Microsoft Software Key Storage Provider, so you have to reissue a cert using Microsoft RSA SChannel Cryptographic Provider as the provider.

I did this by going through the web cert enrollment and using the Web Server template.  Then I assigned the new certificate to the SSL sites in IIS.

The solution is over here.

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blank owa error

By: donovan
20-10-2013
Exchange, Microsoft

it never fails, it never fails… or rather it always seems to fail:  exchange service packs or rollups.  I’ve had to fix quote a few at work and in my home lab.  one thing that I’ve come across multiple times for exchange 2010 is to run a powershell script that automagically fixes the issue.  this post has it right:

Typical, i spend ages looking about with no joy but as soon as i post i find a solution!
For anyone else with the same issue;
"After you install update rollup 1,2 or 3 on an Exchange 2010 Client Access Server you often get a blank OWA page when browsing to the OWA page.
After installing the rollup updates you will receive something like the following URL;https://mail.msexchangeblog.nl/owa/auth/logon.aspx?url=https://mail.msexchangeblog.nl/owa/&reason=0 .
To fix this issue you must start updatecas.ps1 in the Exchange Management Shell. You can find the script in C:\Program Files\Microsoft\Exchange Server\V14\Bin . The script updatecas.ps1 will handle the OWA and ECP updates. The updatecas script comes with the update rollup."

That’s it.

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