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Andersson

Change Exchange 2007 OWA Automatic Logoff time

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Sometimes it’s nice to change the default automatic logoff time for any reason.

 

 

Firstly, it is necessary that you understand the ‘Public’ and ‘Private’ options on the OWA logon page:

 

 

  • Public is the default option for security reasons. If you log in to OWA using this option, your username will not be saved and your session will terminate after 15 minutes.
  • Private is intended for private computers. Selecting this option will cause your username to be remembered for subsequent visits to the site (you must, however, retype your password each time). Your session will also timeout after 8 hours, not 15 minutes.

The server this change is going to be done is at the server that handles OWA, yes you’re right. It’s the CAS server.

 

 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange OWA

 

 

The CAS looks for two DWORD entries within that key: PublicTimeout and PrivateTimeout. If one or both of these keys is not present, the session for which the key is omitted uses its default logoff value.

 

 

To modify the timeout in some way, you can edit or create one or both of the above keys. Set them as DWORD entries. When editing these values, choose the ‘Decimal’ option and enter a value from 1 to 43 200. The value is in minutes, meaning you can cause session to last anywhere from 1 minute up to a maximum of 30 days.

 

 

Having made the changes, restart IIS on the CAS server(s) for the changes to take effect. iisreset /noforce

 

 

 

Done!

 

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