KB ID 0000437
Note: This also works with Exchange 2007 SP3.
If you have a user password that has expired, or you have set the password to be changed at next logon, then this can cause your remote users a problem. Providing they have access to OWA, they can now (Post Exchange 2010 SP1) reset the passwords themselves.
Note: It is possible to log in with an OLD PASSWORD when accessing OWA this will happen for approximately 15 minutes (Special thanks to Jason K. Roberts). For more information see,
Essentially a quick registry change on your Exchange server, then re-start the IIS Admin service.
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