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ScottMcDonald-7128 asked KaelYao-MSFT edited

Office 365 Tenant Migration

I have a law enforcement tenant on 365 that is currently not GCC compliant. In order for them to get compliance I need to move them from the old tenancy to a new GCC compliant tenancy. My issue is, the domain and email addresses are used in the old tenancy, so building anything in advance is not possible, due to the domain and the active users in the old tenancy. How, if possible, can I move the users to the new tenancy without losing the email addresses and subsequent emails. I have read the documentation, and it seems as though a tenant migration isn't really the solution I am able to use. Any help would be much appreciated, as I have no clue on how to accomplish this.

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KaelYao-MSFT avatar image
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KaelYao-MSFT answered KaelYao-MSFT edited

Hi @ScottMcDonald-7128

Have you reviewed this link: Microsoft 365 tenant-to-tenant migrations
In the Tenant-to-tenant migration architecture model it discusses about several scenarios and the general steps.

While in this case, to me I suppose you may need another domain for migration.
Since it would be necessary in mailbox migration.
Reference: Cross-tenant mailbox migration (preview)
189990-31.png

Later once the migration is done, you may verify your old domain in the new tenant.


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Hi @ScottMcDonald-7128

Do suggestions above help?

If you have any questions or needed further help on this issue, please feel free to post back.

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