I think the endpoint must have had some trouble. It's working as intended now.

I managed to fix it. Somehow the custom-generated json had an issue in the img src: After deleting the highlighted area and leaving only "[$Photo.serverRelativeUrl]" it worked! I don't know ...

It finally worked. Here's the code to change one single user's birthday date (...where $creds name is the name of a credential created on the azure automation account used to run the script, with full ...

Matiur's answer was correct. I was in fact connecting to the tenant/admin page instead of the correctg subpage. Thank you.

After looking at the options I found an app called "Employee Directory Pro" on the sharepoint marketplace which works great for what I was looking for right out of the box. Thank you for the ...