Apple Mail client blocked by policy, but which one?

[Vik-Swaptop]

Hi all,

Hope someone of you can help me out with the following:
I have used the macOS baseline to enroll macOS devices. All works fine, but there is one issue which I can't resolve.
The standard Mac Mail application starts, but then notifies that it can't be used because of a configured profile.

I think that it has something to do with security, but can someone confirm this? And if so, could you let me know which policy triggers this behavior?

Thank you in advance for your help!

[SkipToTheEndpoint]

It's been a while since I've had the ability to play with the MacOS stuff due to not having a physical device, but "Allow Cloud Mail" is set to "False" as part of MacOS - OIB - Device Security - D - Restrictions, so it could be that?

The intention was certainly to not allow the use of that and instead use Outlook for mail though.