It is possible to set up an Outlook profile with only a shared mailbox in it. To do this, authentication for the mailbox will still need to be an actual person's login info.
This may be done in order to send a mail merge from a shared/Departmental mailbox.
- Close Outlook.
- In Windows, click Start > Control Panel > Mail (32 bit).
- Add a new profile by clicking Show Profiles.
- Click "Add...".
- Give the profile a name and click OK.
- The email address will be filled in with your info. Replace the pre-filled email address and put in the shared mailbox's full email address. Leave the password fields blank for now.
- Click Next.
- When prompted for credentials, remove the shared mailbox email address and put in a user's who has access to that mailbox and that user's password.
- Check the box to remember the credentials and click OK.
- Click Finish on the next screen.
- Choose whether you would like to be prompted to select a profile each time you open Outlook and then click OK on the Mail window to close that.
- If prompted when opening the profile for credentials, again put in the user's email address (not the shared mailbox) and password.



