Add another person’s mailbox to your profile
If you frequently work with someone else’s Exchange mail folders, you probably will want to add the other person’s Exchange mailbox to your Outlook profile. Doing so will automatically open the other person’s mailbox every time you open Outlook. The other mailbox appears in the Folder Pane beneath your Exchange mailbox folders.
As the delegate, do the following in Outlook:
- Click File > Account Settings > Account Settings.

- On the Email tab in the list, click the Exchange account type, click Change, and then click More Settings.
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On the Advanced tab, under Open these additional mailboxes, click Add, and then enter the mailbox name of the person whose mailbox that you want to add to your user profile. If you do not know the mailbox name, ask the person who granted you Delegate Access permissions.