Add additional mailboxes - Outlook 2013/2016/2019
You can only add and open an additional mailbox that you have been granted access to.
- Click on File
- Click on Account Settings then Account Settings...
- Click on Change
- Click on More Settings
- Click on the Advanced tab
- Click on the Add... button
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Type in the email address of the other mailbox and click OK
- Repeat Steps 6 and 7 for each additional mailbox required
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Once all mailboxes have been added, click OK
- Click on Next
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Click Finish
