As you migrate mailboxes, users will likely keep using their old mailboxes until the new environment is ready.
With incremental copy, you can copy over what has changed since your initial mailbox migration so your users do not lose the content created during that time.
Note: The same basic limitations from your initial mailbox migration apply.
How-to
ShareGate Migrate memorizes your mailbox migrations and their mappings to keep track of what items to increment or copy as new.
To run an incremental copy, you must run a new migration with the same mappings as your original migration from the same instance of ShareGate Migrate as your first migration.
Considerations
Incremental copy scope: You can run a full incremental migration or copy only a few of your originally copied mailboxes.
Domain change: ShareGate Migrate can still recognize your mailboxes after you change your domain.
Incomplete or canceled migrations: Incremental migrations work even if the original migration is incomplete or canceled.
Renamed mailbox categories: If mailbox categories are renamed at the source after the initial migration, they are not updated during an incremental copy. Instead, they are created as new categories.
What is copied or updated with an incremental copy
When performing an incremental copy with Copy mailboxes, ShareGate Migrate will only copy new elements and update existing elements that have been changed since the initial copy.
The following are copied or updated:
New emails are copied.
Emails are updated if they were changed at the source or destination.
Email folders are updated if renamed or moved at the source or destination.
Contacts are updated if they were modified at the source or destination.
Contact folders are updated if renamed at the source or destination.
Category colors are updated if modified at the source or destination.
Rules are updated if they were changed at the source or destination.
Calendar events are updated if they were changed at the source or destination.