So as easy as Tenant Type sounds at one time there were over 20 different Tenant types. This is because there was basically 6 different types of Tenants and some had Business and Some had enterprise SKUs.
Microsoft has been working for a long time now to try to clean this mess up but they still have 5 standard paths. Sound confusing yeah well…
So let’s just say you were originally SKUed (yeah I made that up) in a tenant type that no longer exists it doesn’t mean your tenant type just disappears… instead it means you were updated or were at least supposed to be updated into another SKU.
You can find your current Tenant type by doing a Get-OrganizationConfig |FL and looking for the ServicePlan - even when you do find that good luck on getting a definition on what it means exactly as I have yet to see an accurate breakdown of the BPOS tenants.
I know this all seems complicated, it is… but if your able to get a few ducks in a row then you don’t have pain and agony.
For instance, If you’re a Not For Profit, do a Not For Profit trial to start your account, don’t do a standard E1 or Government Trial. - Pretty simple. If you do get into the wrong Tenant the only thing to do is vacate the Tenant and start over in the right one - Pretty ugly…
Also I don’t know about the 2000 licenses for Not For Profit, that could be. However I can tell you that I have personally worked on a Business account with 30,000 E1 and 8,000 E3 in the same Tenant. It was terribly slow but then that’s the cloud for you.