You can place a legal hold on a user or organization to ensure that repositories they own cannot be permanently removed from your GitHub Enterprise instance.
Usually, if someone deletes a repository, it will be available on disk for 90 days and can be restored via the site admin dashboard. After 90 days the repository is purged and deleted forever. If you place a legal hold on a user or organization, repositories they own are available for restore indefinitely.
Sign in to your GitHub Enterprise instance at
In the upper-right corner of any page, click .
In the search field, type the name of the user or organization and click Search.
In the search results, click the name of the user or organization.
In the upper-right corner of the page, click Admin.
In the left sidebar, click Admin.
Click Place legal hold.