A migration table is used when you copy or import a Group Policy object (GPO) from one domain or forest to another. The key challenge when migrating Group Policy objects (GPOs) from one domain or forest to another is that some information in the GPO is actually specific to the domain or forest where the GPO is defined. When transferring the GPO to a new domain or forest, it may not always be desirable, or even possible, to use the same settings. You can use a migration table to reference users, groups, computers, and UNC paths in the source GPO to new values in the destination GPO.
You can create migration tables using the Migration Table Editor.
This section includes these topics:
Additional referneces
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Back Up, Restore, Import, and Copy Group Policy Objects
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For more information about GPMC migration tables, go to
https://go.microsoft.com/fwlink/?LinkID=63300 .