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A cutover migration is the simplest way to get all your existing email into Office 365. As the name implies, it’s a cutover from one service to another. As showcased in a previous post, cutover migrations are supported for Exchange 2003, 2007 and 2010; for organizations with fewer than 1000 mailboxes. The process is pretty straightforward, however, be sure to properly test the migration plan prior to trying to implement. Step 1: Planning
Microsoft has done a great job of providing good quality information for administrators to use, to plan the migration to Office 365. It is always recommended to use the Exchange Deployment Assistant as a guide for all migrations. This site is up to date and will cover most of all the migrations scenarios to Office 365.
Step 2: Testing the Existing Setup
Using the guide from the Exchange Deployment Assistant, we need to make sure that our Exchange 2007 infrastructure supports Outlook Anywhere (RPC over HTTP) and Autodiscover. Use the guide to verify the Exchange 2007 setup. Once the setup is verified to be correct, use the Microsoft Remote Connectivity Analyzer to verify Outlook Anywhere (RPC over HTTP). Make sure that you have assigned the correct permissions to the mailboxes that you are migrating.
Once the test is successful, you can continue to the next step. If it’s successful with warnings, review the warnings and correct them if needed. If the test fails, use the report generated and the guide (Exchange Deployment Assistant) to resolve the issues.
Use the guide and assign the correct permissions to the mailboxes. If you don’t assign the migration account permissions on the mailboxes, they will not migrate. Step 3: Configure Cutover Migration
Enter on-premises account credentials (this is the same account that you gave full acccess permissions to on all the mailboxes).
Click Next. When configured properly, Autodiscover should resovle the on-premise Exchange Server and the RPC Proxy Server
Enter a name for the New Migration Batch.
Select a user to get a report once the migration is completed. Multiple accounts can be selected. If you are ready to start the migration, then automatically start the batch. If you are not ready to start the migration, then select manually start the batch later.
The new migration batch is created and the status is set to syncing.
Step 4: Completion of the Migration
When all the accounts are provisioned and the sync from Exchange 2007 to Office 365 is completed, you will get a report emailed to you. Once you get the report, you can complete the migration process.
At this point the migration is complete and the Exchange 2007 server can be retired.
Be sure to take advantage of the Microsoft Virtual Academy to learn additional aspects of Office 365 to better enable your organization.