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1. Click File
   
2. Click Add account
   
3. Enter the external email and click Connect(Note: The external email you are adding should be approved by the company and have outlook installed)
   
4. After adding the e-mail, it should automatically populate the groups name on the right side of Outlook in the groups section.
   

NOTE: The more email you add, the high the items will be on the left area (Which can sometimes confuse you)

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