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Ways to migrate multiple email accounts to Microsoft 365 or Office 365

Option 1: Migrate all mailboxes at once ( cutover migration) or Express migration)

Use this type of migration if you're running Exchange 2003, Exchange 2007, Exchange 2010, or Exchange 2013, and if there are fewer than 2000 mailboxes. You can perform a cutover migration by starting from the Exchange admin center (EAC); see Perform a cutover migration to Microsoft 365 or Office 365. See Use express migration to migrate Exchange mailboxes to Microsoft 365 or Office 365 to use the Express migration.


Important

With cutover migration, you can move up to 2000 mailboxes, but due to length of time it takes to create and migrate 2000 users, it is more reasonable to migrate 150 users or less.


Step 2: Migrate mailboxes in batches (staged migration)


Use this type of migration if you're running Exchange 2003 or Exchange 2007, and there are more than 2,000 mailboxes. For an overview of staged migration, see What you need to know about a staged email migration to Microsoft 365 or Office 365. To perform the migration tasks, see Perform a staged migration of Exchange Server 2003 and Exchange 2007 to Microsoft 365 or Office 365.


Step 3: Migrate using an integrated Exchange Server and Microsoft 365 or Office 365 environment (hybrid)


Use this type of migration to maintain both on-premises and online mailboxes for your organization and to gradually migrate users and email to Microsoft 365 or Office 365. Use this type of migration if:


  • You have Exchange 2010 and more than 150-2,000 mailboxes.

  • You have Exchange 2010 and want to migrate mailboxes in small batches over time.

  • You have Exchange 2013.

Please contact to info@thecloudconsulting.com for more information.

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