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https://productforums.google.com/forum/#!topic/play/86WVa8b_3i4
Things not available to Google users with an Apps account:
- Google Fi
- Google Spaces
- Trips
- Allo
- Play Music Family Sharing
- Play Library (apps) Family Sharing
- YouTube Red
But also... device management via the "Find my device".
If you are an apps user then you need a policy applied and devices to be managed by the apps account, which I could never get working. Yet it won't allow the domain account access to the Gmail version of the device management tool.
I made the mistake of trying to use the "find my device" functionality, and the only way to back out of it was to factory reset the phone.
- Google Fi
Factory reset.
The whole story around having a Google Apps account as your primary account is not a good one.
Got into a fight with it about device management. I lost. Decided to take revenge.
It did fix the Instagram thing though.