GrantSendOnBehalfTo Permissions for Mailbox overwrites Existing permission.

Following Blogpost explains how to use Exchange management shell to add / remove values from multivalued property on an object. Multivalued property can Contain more than one value. for Example “GrantSendOnBehalfTo’ property on mailbox. * How to configure Send on Behalf. A. Using outlook Delegate tab. B. Using Exchange management console C. Using Exchange Management Console.  — This…

5