Hello All,
I am really hoping to get some help with a seemingly confusing issue. I have end users who use Field Service Mobile (on CRM online, Mobile app version is: 11.3.106.0) and they were able to login fine until something changed in our organization (we are not able to determine if something really changed).
Now, when an end user logs into Field Service Mobile, they get the below error.

If the error is not visible in the above screenshot i have typed it here: "Http Error: AADSTS50079 Due to a configuration change made by your administrator, or because you moved to a new location, you must enroll in multi-factor authentication to access 00000009-0000-0000-000c-000000000000"
Based on the above error description, we tried to look for any kind of conditional access on Azure AD that is imposing MFA. Our AD team says they dont see any such policy that imposes MFA, they seem to be believing that its something on CRM that is causing this error.
From my experience, this behavior is not managed on CRM.
Another observation was that, when users login using Resco mobile app, they are able to login fine, which kind of proves that issue dosent reside on CRM.
We have engaged Microsoft and but even they haven't been able to find out the issue so far.
Any help, suggestions or insights will be very much helpful.
Also, if possible can someone explain what would be the authentication flow when we login from a Field Service Mobile app?
Thanks,
Poornima