How to migrate emails from M365 account to another M365 account(Different Domain Name)

Question

How to migrate emails from an M365 account to another M365 account (Different Domain Name)

Answer 1

Based on your question, it seems that you need to migrate email data from one tenant to a new tenant with a different domain. Luckily, there are many tools available to assist you with this process. One option is the Microsoft Tenant to Tenant Cross Tenant Migration Tool.

https://learn.microsoft.com/en-us/microsoft-365/enterprise/cross-tenant-mailbox-migration?view=o365-worldwide

Additionally, there are third-party tools like MigrationWiz or Quest on Demand that can help you migrate your data. Using these tools can simplify the migration process and make it easier to transfer your data to a new domain.

Answer 2

Could you please try clearing the cache in the user's web browser also please take a look on the below

https://learn.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/cannot-access-calendar-outlook-web-app

Answer 3

Hi @Jonathan Song ,

How to migrate emails from an M365 account to another M365 account (Different Domain Name)

From your description, are you just want to move the email content from a M365 mailbox to the other mailbox which is on a different domain?

If this is the case, you can export the emails to PST file from the source mailbox using eDiscovery, and then import the PST file to the target mailbox using network upload. Below are some articles about the procedure of export and import for reference:

• How to export Office 365 mailboxes to PST using eDiscovery
  (Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
• Use network upload to import your organization's PST files to Microsoft 365

If you need to migrate the mailbox over to the other Microsoft 365 account in a different tenant, kindly refer to the official document shared earlier by Mohamed, or you can check the document below as well:

How to migrate mailboxes from one Microsoft 365 or Office 365 organization to another

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