Post date: Apr 18, 2013 7:33:26 AM
Enable Users to Change Expired Passwords
You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Outlook Web App Registry Editor" entry in the Client Access Permissions topic.
Caution:
Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.
Log on to the Client Access server.
Start Registry Editor (regedit).
Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange OWA.
Create the following DWORD value if it doesn't already exist: ChangeExpiredPasswordEnabled. The value type will be REG_DWORD.
Set the value of ChangeExpiredPasswordEnabled to 1.
Exit Registry Editor.