Hi
My name is Daniel. I am an Independent Advisor.
Since the problem keeps persist even after you have done so many troubleshooting steps, in this case, I'd like this issue to be investigated furthermore by MS Support to determine the best next steps. Moreover, as institution account users, you are entitled to the more advanced support you deserve, please take advantage of it.
There are 2 alternatives to reach out to MS Support :
Alternative 1.
Please visit the following link, scroll down, and select your country from the dropdown list:
https://docs.microsoft.com/en-us/office365/admi...
Alternative 2: Via MS 365 admin center.
If you have MS 365 license you can go to
https://admin.microsoft.com select support > New service request. You can choose whether you want to receive support via email or phone support. However, if you don't have MS 365 license then you need to reach out to your admin and ask the admin to open a new support ticket. This is optional, If necessary you can request your admin to put your number as the preferred contact method so MS Support can call your number. See the demo video below:
https://www.youtube.com/watch?v=73ywno9lR_4
DISCLAIMER:
There's a link above from the non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
Kind Regards
