In Outlook, people can permit someone else to access their mailbox (e.g., inbox and calendar). This feature is called Delegate Access. Outlook allows another person, known as a delegate, to create and respond to meeting requests as well as sending and responding to e-mail messages on another's behalf.  A delegate can be assigned a range of permissions, including the ability to read, create, or have full control over items in the delegator's Exchange mailbox.

The person granting permission, the delegator, determines the level of access given to the delegate. Among other options, a delegate can be permitted to perform the following tasks:

• Read items in folders
• Read, create, modify, and delete items
• Send and respond to e-mail messages on the delegator's behalf
• Organize meetings and respond to meeting requests and task requests on the delegator's behalf

Delegate Access is most commonly used between a manager and assistant, where the assistant (delegate) is responsible for processing the manager's incoming meeting requests or email messages and coordinating the manager's schedule. Delegate Access can be used between peers as well (e.g., to coordinate schedules).

Microsoft provides instructions to manage delegate access.