This question has been asked many times and usually assumed it is not possible. It is possible to create a stand-alone Outlook mail profile for Office 365 / Exchange Online or even in On-Premises Exchange server. You don’t need to enable Shared Mailbox’s AD account or use Shared Mailbox’s AD account. All you need to verify is you have FULL access permissions to the Shared Mailbox.
Now, this is how it is done:
- Close Outlook if it is already open.
Open Control Panel and Open Mail (Microsoft Outlook 2016)
- Click Show Profiles.. and Click Add… to create a new profile. Enter the appropriate name of the profile.
In Add Account window, Enter the Name of the Shared Mailbox (well you can type anything here), then enter the Email Address of the Shared Mailbox.
Note: You don’t need to type password at all here.
- Click Next
- When asked, enter YOUR CREDENTIALS. Since you have full access permission on the Shared Mailbox, profile should create it successfully.
That’s all. Don’t forget to change the default Outlook profile in Mail settings.