Suppose I have two SPSites in SharePoint Online. My app is installed on an SPWeb in one of the site collections.
When running the app you get a context token for the site collection where the app is installed. Is is possible to get a client context for the other site collection, so my app can access data there too, given that the user running the app has sufficient permission? I don't want to use an AppOnly context, since this can't make changes to term sets in the term store.