Working with users in SharePoint can be challenging when using HTTP requests. Different requests require different user information, such as email, claims login, or SharePoint principal ID. The principal ID is a unique ID assigned to a user on a specific SharePoint site. It is used for managing permissions and creating items in SharePoint lists. To obtain the principal ID, an HTTP request is needed. If the user does not have a principal ID on the site, a separate HTTP request can be used to create it. This ensures that the user has a principal ID before using it in other requests. Knowing about the existence of principal IDs can be helpful when working with HTTP requests in Power Automate flows.
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