Add Site Collection Admin

How to add the site collection admin role to a user in a single SharePoint Online site collection using a Power Automate flow.




Screenshot with example

Sample data
User Id – in my sample I am updating the role for Jane Doe, who has principalId 14 in my site collection.


Copy/paste example


User.IsSiteAdmin Property
Web.GetUserById method

That’s it, Happy testing!

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