Environment: Outlook for Mac with a shared mailbox account
Purpose: Performing a mail merge with a shared mailbox account
- Open Outlook on your desktop
- In the upper bar (where file/edit/view/etc. is), click Tools > Accounts

- Click on your shared mailbox you plan on doing the merge from to highlight it
- Click the gear icon in the lower right hand corner of the list of mailboxes
- Select "Set as Default"

- In the menu bar of Outlook
- Select Tools
- Use the toggle to move the account work offline

- Proceed with your mail merge as usual
- Once your mail merge is complete turn the toggle to work online to send the emails