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.
Index
How-to
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.
ShareGate Migrate memorizes your mailbox migrations and their mappings to keep track of what items to increment or copy as new.
When you start a new migration, you can run all, or any subset, of mailboxes previously migrated with the same instance of ShareGate Migrate, as incremental. For example, if your previous migration included 50 mailboxes, you can run an incremental copy on all 50 or any smaller subset of those 50 mailboxes. Any mailboxes not previously migrated will get copied as new.
Note: If you run an incremental mailbox copy on a user after a domain change, the migration will still recognize them and perform the incremental accordingly since Copy mailboxes uses User ID to store previous migration data. This should work as long as the same user account is used, not a new one.
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 they were 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 they were renamed at the source or destination.
Category colors are updated if they were 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.