Provide the ability to write to Managed Metadata via app-only policy
App-only policy in the SharePoint App Model is very restricted regarding Taxonomy operations. Even if an app is granted full control over the tenant, it lacks the permission to do anything but read operations on Taxonomy. Please provide the ability to create Groups, Term Sets and terms using app-only policy.
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Gabriel Smoljár commented
I'd even call this a bug. In Azure AD you can grant "Read and Write Managed Metadata" app-only permissions to your app. But as you say, it doesn't work.