We would like to change the WelcomePageView for a DocumentSet in SharePoint Online using CSOM C#, or PnP OfficeDev.
We are able to change the WelcomePageView for a DocumentSet using the web interface.
But when trying to do this through C# code, we noticed that the SchemaXml of the DocumentSet contenttype is readonly, and can't be set through C# code.
We found some code samples, but that only applies to Server Side Code.
Is it possible to do this through CSOM (Client Side Object) code ?