When you use the EMS cmdlet Set-CASMailbox to configure user-based segmentation for Outlook Web Access, you may already have noticed that even though you set the value of just one property to $False, by running a simple line like
Set-CASMailbox UserA -OWAChangePasswordEnabled:$False
Exchange will set the value of all properties starting with OWA to $False, thereby disabling almost every feature of Outlook Web Access for that user or the users you selected to change. Exchange will enable the ability to change the password using OWA, but will disable all other features that weren’t explicitly enabled or disabled prior to running the cmdlet. There are quite a few easy ways to reset or undo the changes.
