Windows authentication against GroupShare not working via Studio 2021 API

Question

For authenticating I tried this one: 
 obj_Project.Credentials.AddCredential(new Uri("http://servername.com), true, "", ""); 
 
 and this one: 
 obj_Project.Credentials.AddCredential(new Uri("sdltm.http://servername.com), true, "", "");

Community Jira · Answer

An issue has been created on Jira with the internal tracking nr. CRQ-33068

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Windows authentication against GroupShare not working via Studio 2021 API