To add another person's mailbox to your profile
If you frequently work with someone else's Exchange 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 each time you open Outlook. The other mailbox appears in the Navigation Pane beneath your Exchange mailbox folders.
NOTE The person who is sharing a mailbox must grant you Folder Visible permission on the root folder of the Exchange mailbox.
As the delegate, do the following in Outlook:
On the Tools menu, click Account Settings.
In the list, click the Exchange account type, and then click Change.
Click More Settings, and then click the Advanced tab.
Click Add, and then enter the mailbox name of the person whose mailbox you want to add to your user profile.
