Promote converts your subsite to a site collection by migrating it to the same level as your other site collections.
Note: You can decide to keep your original subsite in the options when using Promote.
- You have global admin, Farm admin, or SharePoint admin permissions.
- You have site collection admin permissions on the site collection that contains the subsites you want to promote.
- You have term store admin permissions on your source and destination if you have managed metadata (Terms, Term sets, Term set groups) in your migration scope.
- You are connected to your Microsoft 365 Admin center or SharePoint central admin.
Note: Site collection admin permissions are required even if you have higher admin privileges like SharePoint admin or global admin permissions. For more information, see Administrative permissions.
- Select Copy from the sidebar.
- Select the Restructure environment tab.
- Select Promote subsite into site.
- Click on the web app at the top to select another one, or to add a new connection.
- Expand the site collection with the subsite(s) you want to promote.
- Add a check mark to the left of the subsite(s).
- Click Continue to options.
- Set your options.
- Click Promote.
The operation will run, displaying the progress summary from the Promote report screen. You can access the summary and the Promote report at any time from Tasks.
Note: The permissions are handled the same as with Copy structure when promoting a subsite as a full site copy.