How can I prevent users from using Microsoft Office Outlook’s delegation feature?

Executive Summary:

Prevent users from using Microsoft Office Outlook’s delegation feature.

Q: How can I prevent users from using Microsoft Office Outlook’s delegation feature?

A: In a standard Exchange Server organization, users can grant other employees delegate access to their mailbox or folders. This practice typically occurs when a manager grants access to an assistant, or when an employee goes on vacation and delegates mailbox access to a co-worker. However, delegation is often performed incorrectly—and sometimes even inadvertently—which can unintentionally expose information to the wrong personnel. Although I don’t know of a method for completely preventing Outlook delegation in an Exchange environment, you can prevent users from using delegation by removing access to this feature in the UI. . . .