Office 365 (Outlook 2016 / 2019 for Mac) - Open a Shared Folder or Mailbox
Choose the appropriate option depending on whether the mailbox is shared with you or you are a delegate for another user's mailbox.
- When you use any of these methods, the shared mailbox account is added as an option in the From field when you compose emails. This lets you select the account in the From field regardless of whether you have permissions to send from this account. If you do not have "Send As" or "Send On Behalf of" permissions for the account, email from the account will not be sent.
- Outlook for Mac does not support Auto-mapping of shared mailboxes.
A folder is shared with you
- On the File menu, click Open
- Click Other User's Folder.
You are a delegate for another user's mailbox
- On the Tools menu, click Accounts > Advanced > Delegates.
- Add the mailbox under Open these additional mailboxes.
Note: If you have permissions to custom folders in the mailbox but not to the top-level mailbox folder, the custom folders will not appear in the folder list. Only default folders that you have permissions to, such as Inbox, Sent Items, Deleted Items, and Calendar, will appear in the folder list without top-level mailbox folder permissions.
You have full access permissions to a shared mailbox
When you have Full Access permission to a shared mailbox—that is, Full Access permission of a mailbox set up through Exchange Admin Center (EAC)—you can add the shared mailbox with your own credentials.
To open the shared mailbox:
- On the Tools menu, click Accounts.
- Click the Plus Sign to add an additional Exchange account.
- In the E-mail address field, enter the email address of the shared mailbox.
- Under Authentication, enter your own credentials.
Permissions for shared folders and mailboxes
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