Outlook Profiles let you keep multiple email accounts, settings, and data separate, you may add a shared mailbox as a profile to keep it separate from your main email account while still allowing easy access to make autoreply, forwarding and rule changes when needed. If you add a shared mailbox as a profile be sure to also "add additional mailbox" to your main Outlook profile using the directions above (Add additional mailbox (Outlook on Windows))
How to Create a New Outlook Profile:
1. Close Outlook.
2. Open the Control Panel (use Windows Search for "Control Panel" to quickly find it).

3. select Mail (Search for “Mail” in the search box to quickly find it).

4. Click Show Profiles.

5. Click Add, enter a name for the new profile, and click OK.

6. When the "Add Account" window appears, immediately close it by clicking "Cancel".

7. Click "OK" on the notification that appears.

8. Check that your mail Outlook profile (usually named "Outlook") is selected under "Always use this profile" and then click "OK" to close the window. It does not matter what profile is highlighted when you click OK.

9. Open Outlook normally.
10. Click "File" then choose "Account Settings" and "Change Profile". Outlook will close automatically with a notification that you must reopen Outlook manually.

11. Open Outlook and choose the shared mailbox profile that you created when prompted to choose a profile.

12. Change the email address from your own to the shared mailbox email address, click "Connect".

13. Follow the directions in the "Add mailbox as an account (Outlook on Windows)" section above from step #5 onwards to authenticate as yourself.
14. To switch back to your own mailbox, click "File" then choose "Account Settings" and "Change Profile". Outlook will close automatically with a notification that you must reopen Outlook manually. You may do this anytime needed to switch back and forth.