Only permissions with one of the standard access levels below are migrated: Note: Special permission levels are not supported.

If the ShareGate migration tool finds custom permission levels on your items at the source, the items will migrate with broken inheritance (custom permission levels) at the destination, and all the permission levels will be preserved. If there are no custom permission levels on your documents and folders, they will inherit the permission levels from the parent in SharePoint. The ShareGate migration tool will preserve permission levels on files and folders with custom permission levels at the source. For more information, see Users and groups association (automatic mapping). This association is done through the SharePoint people picker to preserve your permissions, and Person or Group metadata values. Your users and groups are automatically mapped at the destination.

How can I preserve my file share permissions?.This means that they have access to everything in the site, including items with custom permission levels. Note: When you migrate to a site associated with a Microsoft 365 group, note that the owners of your group are automatically granted site collection admin permissions on that site. This article explains what happens to your permissions when doing an Import from file sharemigration. The ShareGate migration tool carries your associated permission levels during a migration and will attempt to preserve their integrity from the source to the destination whenever possible.

File share permissions report