Splitting users into a separate tenancy

Question

When I log into 365 as an admin I can see users for 3 companies that I originally added.

Each set of users is billed using a different credit card and they have different domains.

I am no longer involved with one of the companies so I need to split off their users and put them into their own tenancy and promote one of them to be an O365 administrator.

I have looked online for help but most topics seem to relate to migrating the mailboxes to new domains. I don't want to do that, they need to stay in their current domain, just not within my O365 account.

Any suggestions please?

Answer 1

Hi Antony,

You need to remove the domain from company B (you will be no longer involved.), then add the domain to a new company( company A).

Before moving the domain, you can back up the users' information of OneDrive for Business and mails.

For the backup of OneDrive for Business, you can use new OneDrive sync client to sync the files to local location, then transfer the files to another sync folder of another account in local location first, and sync the files to the new OneDrive for Business account later.

For the new OneDrive sync client, please refer to the articles:

Get started with the new OneDrive sync client in Windows

Get started with the new OneDrive sync client on Mac OS X

For the backup of mails, you can refer to the articles:

Export or backup email, contacts, and calendar to an Outlook .pst file

Back up your email

Archive or back up your mailbox

For removing and adding domains, you can refer to the articles:

Remove a domain from Office 365

Add a domain and users to Office 365

After you finish all above, when you create new users in the new tenant/company,  you can set a user as  the Administrator by editing the Roles for the user in Office 365 Admin Center.

Regards,

Tina

Answer 2

Hi Antony,

Let us know if you have any updates.

Regards,

Tina

Answer 3

Hi Tina,

We (I) currently own both Domains.

When I login to 365 as either domain, I can see all users from both company A and company B as I am an admin in both I presume.

Moving forward, I will no longer be involved with company B so I need to put them into a separate view and promote one of the guys to become an admin. 

How do I do this?

Thanks

Ant

Answer 4

Hi Antony,

Please note that we cannot move users from one tenant to another tenant directly. That is to say, the users you want to split cannot use their current domain, they need to use their companies' own domain after moved to their companies.

Thanks for your understanding.

Tina