To access another person's Mailbox in Outlook, follow these instructions:-
1. Open Outlook on your PC
2. Click on the File tab
3. Click on Open & Export
4. Click Other User's Folder
5. In the Name box, enter the name of Mailbox of which you have been granted Sharing or
Delegate Access permissions, or click Name to select from a list.
6. Select the Folder Type you wish to open.
7. Click OK