Office 365 Tenancy Considerations

I have been receiving a lot of questions lately around Office 365 tenancy.

My simple answer is:

• Multiple tenants are ok, and are completely necessary for complex organizations.
• It is best to plan out tenancy as best as you can up front to avoid merging or divesting tenants only when necessary.
• Microsoft is investing in building solutions for complex organizations such that multiple tenants can work with each other in a B2B relationship.

Here is a great video on the futures for cross tenant collaboration - 

https://myignite.techcommunity.microsoft.com/sessions/81571

Here is a poster on tenant-to-tenant migration scenarios you should be thinking about - 

https://docs.microsoft.com/en-us/office365/enterprise/microsoft-cloud-it-architecture-resources#architecture-approaches-for-microsoft-cloud-tenant-to-tenant-migrations