Unable to toggle the Automatically update e-mail addresses based on email address policy for a user mailbox that exists in Microsoft Exchange 2016. This issue affects both the Administration Console, and the Active Roles Web Interface. When attempting to remove the check mark in this box and selecting the apply or ok option to commit the changes. The check mark is placed in the box again.
This defect#184339 has been resolved in Active Roles Server 7.4.1. Apply the latest upgrade to resolve this issue which can be found here.