Hello all,

I am hoping someone can help me with this problem I'm having.
When we try to set out of office it says the "server is unavailable" on the client and when on OWA it says "Sorry! We're having trouble processing your request at the moment. Please try again in a few minutes."

The really confusing bit is on 1 of out computers we can get the OWA to work and that one has a different UI then the others seems to be an older looking one.

Would anyone have any advice on this.

Many Thanks Andrew

This is all on Server 2012 running SBS2011 Standard, Virtual Machine with exchange

• Edited by Jianneo 14 hours 57 minutes ago

Jianneo,

Hopefully one of these ideas will lead you in the right direction:

First Idea:
The problem was caused by several Application Pools in IIS having been somehow set to use .NET 4.0 rather than 2.0.  By changing these to .NET 2.0, the problem was solved.  The specific application pools were:

DefaultAppPool
MSExchangeECPAppPool
MSExchangeOWACalendarAppPool

Another solution was:
I had a host header in the site bindings for the default web site in IIS. Not sure why or how that got there. Removing that, run iisreset from cmd prompt and it's now working again.

Third Idea for you:
Could be an anthentication issue on the WebServicesVirtualDirectory.

The this command and check that you WindowsAuthentication is enabled:
Get-WebServicesVirtualDirectory | fl Identity, *auth*

Fourth Idea:
what worked was deleting both the ecp and owa virtual directories, then recreating them:

Get-EcpVirtualDirectory | Remove-EcpVirtualDirectory
New-EcpVirtualDirectory

Get-OwaVirtualDirectory | Remove-OwaVirtualDirectory

New-OwaVirtualDirectory

Fifth Idea:
If you go into EMC>Server Config>Client Access  you wil see Outlook Web App, Exchange Control Panel, these need to match your Bindings in IIS

Final Idea:
Stop all the Exchange services on Client Access Server from services console.Stop the IIS - Click Start menu click
Run type iisreset/stop , and then click OK .Go to - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files.Delete all the files and folders after taking backup.Start all Exchange services on Client Access Server from services console.Start the IIS - Click 
Start menu click Run type iisreset/start , and then click
OK .