How to Change Expired Password in Outlook Web App
How to Enable the Exchange 2007 SP3 And Exchange 2010 Password expired in Outlook Web App
Start Run and type regedit.exe and click OK
Navigate to HKLM\SYSTEM\CurrentControlSet\Services\MSExchange OWA.
Right click the MSExchange OWA key and click New DWord (32-bit).
The DWORD value name is ChangeExpiredPasswordEnabled and set the value to 1
Close Regedit.Exe And Restart IIS
