Microsoft Graph API: SharePoint: Upload files into restricted folders

Question

I was unable to find any documentation on using the Graph API to upload documents to some of the restricted folders such as sharepoint.com/_catalogs/masterpage/Forms directory. Would the use of the Permissions API for the Azure application that we run Graph API enable the use of the regular upload via Drive Item API into these directories or is there another call that will be rolling out to enable the update to directories like sharepoint.com/_catalogs/themes/ ?

If this functionality is not going to be available through the Graph API, is there a non-deprecated API that will allow for the uploading of files? Using an GUI would not be a satisfactory solution.

Answer 1

Hi @totally_gizmo Per my test, the Master Page Gallery is restricted. When I try to upload a file I will get "Access Denied" error even if I am a Site Collection Admin. There is a "Deny" rule that restricts access to Master Page Gallery. And this rule is not a part of any Permission levels available on the site collection. We can set it using SharePoint Online Management Shell

Connect-SPOService https://&ltyourtenant>-admin.sharepoint.com
Set-SPOSite -Identity https://<yourtenant>.sharepoint.com/sites/<team-site> -DenyAddAndCustomizePages $false

After that the permissions in Master Page gallery work as expected and the Deny rule is gone.

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