We are in the process of moving mailboxes from our 2010 environment to our 2013 environment and are using the 2013 CAS as internet facing, for any mailboxes on 2010, requests are proxied through.
We have the registry DWORD ChangeExpiredPasswordEnabled set to 1 in HKLM\SYSTEM\CurrentControlSet\Services\MSExchange OWA but this isn't working.
It use to work perfectly well when we had the 2010 CAS server internet facing.
Is this still supported in Exchange 2013?