This is because a shared mailbox does not have its own security context (username/password) so it cannot be assigned a key. To learn more, see Compare Groups.Įncryption: You can't encrypt email sent from a shared mailbox. Another option is to create a group for your shared mailbox. To learn more, see Add a shared mailbox to Outlook mobile. Use with Outlook: In addition to using Outlook on the web from your browser to access shared mailboxes, you can also use the Outlook for iOS app or the Outlook for Android app. To learn more, see Create a Microsoft 365 group in the admin center. If you want to do this, consider creating a group for Outlook instead. Only people inside your organization can use a shared mailbox.Įxternal users: You can't give people outside your business (such as people with a Gmail account) access to your shared mailbox. User permissions: You need to give users permissions (membership) to use the shared mailbox.

The shared mailbox is placed on litigation hold.įor step-by-step instructions on how to assign licenses, see Assign licenses to users.

The shared mailbox uses in-place archiving.

The shared mailbox has more than 50 GB of storage in use.

The following scenarios require an Exchange Online Plan 2 license: Senders to the mailbox will get a non-delivery receipt. Then, after that, it will stop receiving email. When a shared mailbox reaches the storage limit, you'll be able to receive email for a while, but you won't be able to send new email. For more details on shared mailbox licensing, please see Exchange Online Limits. After that, you need to assign a license to the mailbox to store more data.

Licenses: Your shared mailbox can store up to 50GB of data without you assigning a license to it.

This is particularly useful for help and support mailboxes because users can send emails from 'Contoso Support' or 'Building A Reception Desk.' Before you beginīefore you create a shared mailbox, here are some things you should know:

Users with permissions to the group mailbox can send as or send on behalf of the mailbox email address if the administrator has given that user permissions to do that. Shared mailboxes are used when multiple people need access to the same mailbox, such as a company information or support email address, reception desk, or other function that might be shared by multiple people.

Shared mailbox office 365 mac