It could be a local security policy. It could still be a group policy object that is linked to an OU that has your computer as a member.
You can run gpresult on your PC, but you still need someone that has knowledge about the policies in the domain to help you troubleshoot.
Can you create a new local user, log in with that local account and create a new Outlook profile just to verify if this issue applies to multiple users on the same box. Or have a coworker log into your machine with their domain account.