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O365 - Tenants - Types and Licenses

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Super Contributor

Hi 

Can someone tell me how many "Types" of Tenants (options) there is in the O365 system? :D - And how to get "Federated" Tenants 

Case 1

A Faculty have an EDU Tenant/subscription where Professors, Teachers, Students, and other Faculty Staff have an O365 license - the Faculty also have a "Business" Tenant/subscription for their Admin staff and other personnel.

How can the Faculty get only 1 license on their users so Teacher1 (which is already licensed in the EDU Tenant) use the same license in the Business Tenant? - so the Faculty doesn't need to pay for 2 licenses for that Teacher1?
Can the Faculty in their Business Tenant use the B2B Azure collaboration and "invite" all the users in the EDU Tenants? 

Case 2 
A Company based in the US have a Tenant/subscription - and they use the domain Contoso.com and they also have a branch Office in France, Europe.
The Office in France have their own Tenant and uses a subdomain of the US Domain like fr.contoso.com - there's no common AD - nor Trust between the 2 ADs  

Can the US-based company initialize some kind of a "Multiple" Tenant and create a "Sub-Tenant" underneath and "give" this Sub-Tenant to the Office in France, so the Office in France can Admin their own Tenant, independent of the US Tenant?   
  

2 Replies
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Best Response confirmed by Taen keren (Super Contributor)
Solution
Commercial, Edu, Government and Non Profit are the main ones. Free tenants (I.e. Teams) could class as seperate too. Oh and personal (365 home)

Case 1
You could use Azure B2B here but would probably look to do a tenant to tenant migration and merge the two environments. AvePoint and BitTitan are two options here

Case 2
Yes, you can set up two tenants one with a root domain and another with a sub domain if you wanted to split out the management

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_o365admin-mso_domains/new-tenant-with-a-...

Hope that answers your questions

Best, Chris
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