Internal file permissions can be migrated from Box, Dropbox, File System, Google Drive and Microsoft 365 (OneDrive and Sharepoint) to Google Workspace and Microsoft 365 destinations.
When migrating from Google Drive (not including Shared Drives), all permissions will be migrated automatically. For other platforms, you can disable the option to migrate them.
For all platforms, including Microsoft 365 destination, file and folder ACLs are accessed when migrating the item and simply recreated on the Destination item. Domain & Address replacements can be used to map email or group addresses to other addresses in the Destination system.
If the Destination user or group cannot be found the permissions will fail to be added to the migrated item.