Mailbox Migration- One M365 tenant to Another M365 tenant

Question

Mailbox Migration- One M365 tenant to Another M365 tenant

Abi 120

Dear Microsoft

We're in the midst of a merger and would like to migrate the mailbox, onedrive and sharepoint content from one M365 tenant to another M365 tenant. This is migration is one time only to migrate the mailboxes and onedrive contents. We will no longer have any partnership with the source tenant. So basically migrate the mailboxes and other stuff and close the connection with source tenant.

My question is

Does removing migration end point and removing organization relationship as per this article is enough to get rid of the connection
I was reading the FAQs from the above link and came across this (how does mail flow works after migration). I dont want to have a mailflow created with the source tenant. I dont need a cross-tenant mailflow. What should I do to Disable this ( Or not enable this at all) ?

Thanks

Abi

Anonymous

2024-06-12T02:18:05.23+00:00

Hello, @ Abi

It's been a long time since I've heard from you, have you solved your problem yet? Did my previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Abi 120 Reputation points

2024-06-16T18:36:21.4533333+00:00

Hi @Anonymous Thanks for your reply. On point number 2. The problem is this will be only one and done kind of migration. so once the mailbox migration is over, there will be no connection and business with the source tenant. Hence we will not establish any cross tenant mail flow. So what do we do in such case?
Anonymous

2024-06-24T08:50:31.4433333+00:00

Hello, @ Abi

Did your test results match your expectations? Did pradeep sharma 's previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Anonymous

2024-06-28T08:42:50.6033333+00:00

Hello, @ Abi

Did your test results match your expectations? Did pradeep sharma 's previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.

Accepted answer

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Anonymous

2024-06-12T02:18:05.23+00:00

Hello, @ Abi

It's been a long time since I've heard from you, have you solved your problem yet? Did my previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Abi 120 Reputation points

2024-06-16T18:36:21.4533333+00:00

Hi @Anonymous Thanks for your reply. On point number 2. The problem is this will be only one and done kind of migration. so once the mailbox migration is over, there will be no connection and business with the source tenant. Hence we will not establish any cross tenant mail flow. So what do we do in such case?
Anonymous

2024-06-24T08:50:31.4433333+00:00

Hello, @ Abi

Did your test results match your expectations? Did pradeep sharma 's previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Anonymous

2024-06-28T08:42:50.6033333+00:00

Hello, @ Abi

Did your test results match your expectations? Did pradeep sharma 's previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.

Answer 1

Hi，@Abi

Thanks for posting your question in the Microsoft Q&A forum.

Based on your questions, I will answer them in turn.

1. Can I get rid of connections by deleting migration endpoints and organizational relationships?

Delete Migration Endpoints: Migration endpoints are connection points used during the migration process. Once the migration is complete, you can delete the migration endpoint to ensure that there is no longer a connection to the source tenant.

Deleting Organizational Relationships: Organizational Relationships are used to establish a trust relationship between two tenants in order to share resources. It is a good practice to delete an organizational relationship if there is no longer a need to share any resources with the source tenant.

2. I don't need a cross-tenant mailflow. What should I do to Disable this ？

According to Microsoft's official documentation, each migrated mailbox needs a properly configured source MailUser with a destination address to forward the mail received from the source tenant to the mailbox of the target tenant, so cross-tenant mailflow cannot be disabled for the time being.

If my answer is helpful to you, please mark it as the answer so that other users can refer to it. Thank you for your support and understanding.

Answer 2

pradeep sharma 0

You need to remove the migration endpoints and organization relationship after the migration completes. No need to configure any mail flow. For complete step by step procedure, you will require cross-tenant user data migration license. However, you can check out this guide for complete manual migration process.

Free Guide: https://www.cloudbik.com/resources/blog/tenant-to-tenant-migration-office-365

Abi 120 Reputation points

2024-06-16T18:37:22.8733333+00:00

Thank you Pradeep. I saw the blog. Nicely explained. Ill try that in my test lab.
Anonymous

2024-06-19T06:58:32.28+00:00

Hello, @ Abi

Did your test results match your expectations? Did his previous reply help you？ If it was useful, you can mark it as an answer. Thank you for your understanding and support.
Anonymous

2024-06-25T07:01:45.5+00:00

Hello, @ Abi

Did your test results match your expectations? Did his previous reply help you？ If it was useful, you can mark it as an answer. If the problem is not resolved, please message me.Thank you for your support and understanding.

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Mailbox Migration- One M365 tenant to Another M365 tenant

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