You cannot use it in production. I'm actually curious how this license works for them.
If they get a contribution without a CLA, then they themselves can hypothetically not use it in prod too?
Edit: you can actually use it for your own, but you can't compete with their offering until the date mentioned in the license:
> You may make use of the Licensed Work, provided that you may not use the Licensed Work for a Document Service.
A “Document Service” is a commercial offering that allows third parties (other than your employees and contractors) to access the functionality of the Licensed Work by creating teams and documents controlled by such third parties.
I missed that, I guess that counts as a license. But it's fearfully short, even MIT is longer than that. But there's no grant for contributors, so you have to violate the copyright to make a contribution, even with a CLA (which is a license from the contributor to the rights-holder, not usually the other way round).
If they get a contribution without a CLA, then they themselves can hypothetically not use it in prod too?
Edit: you can actually use it for your own, but you can't compete with their offering until the date mentioned in the license:
> You may make use of the Licensed Work, provided that you may not use the Licensed Work for a Document Service. A “Document Service” is a commercial offering that allows third parties (other than your employees and contractors) to access the functionality of the Licensed Work by creating teams and documents controlled by such third parties.