Applies to: Exchange Server 2013
Topic Last Modified: 2013-02-13
A shared mailbox is a mailbox that multiple users can use to read and send email messages. Shared mailboxes can also be used to provide a common calendar, allowing multiple users to schedule and view vacation time or work shifts.
Why set up a shared mailbox?
- Provides a generic email address (for example, email@example.com
or firstname.lastname@example.org), that customers can use to inquire about your
- Allows departments that provide centralized services to
employees (for example, help desk, human resources, or printing
services), to respond to employee questions.
- Allows multiple users to monitor and reply to email sent to an
email address (for example, an address used specifically by the
What are shared mailboxes?
A shared mailbox is a type of user mailbox that doesn’t have its own user name and password. As a result, users can’t log into it them directly. To access a shared mailbox, users must first be granted Send As or Full Access permissions to the mailbox. Once that’s done, users sign into their own mailboxes and then access the shared mailbox by adding it to their Outlook profile. In Exchange 2003 and earlier, shared mailboxes were just a regular mailbox to which an administrator could grant delegate access. Beginning in Exchange 2007, shared mailboxes became their own recipient type:
- RecipientType: UserMailbox
- RecipientTypeDetails: SharedMailbox
In previous version of Exchange, creating a shared mailbox was a multi-step process in which you had to use the Exchange Management Shell to complete some of the tasks. In Exchange 2013, you can use the Exchange admin center (EAC) to create a shared mailbox in one step. For details, see Create a Shared Mailbox. In fact, the EAC has a feature area devoted entirely to shared mailboxes. Just navigate to Recipients > Shared mailboxes to view all the management tasks for shared mailboxes.
You can configure the shared mailbox with the following delegate permissions:
- Full Access The Full Access permission
allows a user to log into the shared mailbox and act as the owner
of that mailbox. While logged in, the user can create calendar
items; read, view, delete, and modify email messages; create tasks
and calendar contacts. However, a delegate with Full Access
permission can’t send email from the shared mailbox unless they
also have Send As or Send on Behalf permission.
- Send As The Send As permission allows a
user to impersonate the shared mailbox when sending mail. For
example, if Kweku logs into the shared mailbox Marketing Department
and sends an email, it will appear as though the Marketing
Department has sent the email.
- Send on Behalf The Send on Behalf
permission allows a user to send email on behalf of the shared
mailbox. For example, if John logs into the shared mailbox
Reception Building 32 and sends an email, it will appear to
recipients as being sent by “John on behalf of Reception Building
32”. To grant Send on Behalf permissions, you must use the Exchange
Management Shell. Use the Set-Mailbox cmdlet with the
Converting shared mailboxes
In previous versions of Exchange, you could use a regular mailbox as a delegated mailbox. If you have delegated mailboxes, you can use the Shell to convert those delegate mailboxes to shared mailboxes. For details, see Convert a User Mailbox into a Shared Mailbox.