remar27
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remar27
Such error usually means that your add-in client secret has expired.
After further research, I discovered that you can assign permissions to the app for a particular site using the MS Graph API, but your app must have Sites.FullControl.All permissions (https://learn.microsoft.com/en-us/graph/api/site-post-permissions?view=graph-rest-1.0&tabs=http)....