Can't get rid of annoying Microsoft Outlook Anti-virus message

Hi,
I have Windows 11 ARM installed and on Microsoft Office an annoying pop-up every few minutes that says,

A program is trying to access e-mail address information stored in Outlook. If this is unexpected, click Deny and verify your antivirus software is up-to-date. For more information about e-mail safety and how you might e able to avoid getting this warning, click Help.

I read that this is due to an antivirus issue. I checked Windows Defender and it is on and up-to-date. I tried installing a new anti-virus - none of them will install, I presume because it's W11 ARM.
I tried going to Trust Center Settings-> programmatic Access to turn it off. The setting is grayed out.
What do I do?