SAP Content Server: HTTP error: 400 Bad Request, 400 Error, 501 Not implemented

Symptom

You are getting below error while working on transaction code CSADMIN.

HTTP error: 501 Not Implemented ICS:5003: The ArchiveLink command ?adminContRep? is not supported in this scenario
Message no. CMS025

Diagnosis
Error in accessing via HTTP
501 Not Implemented
ICS:5003: The ArchiveLink command ?adminContRep? is not supported in this scenario

HTTP error: 400 Bad Request ICS:5015: The parameter authId is not a valid parameter for the serverInfo command

Message no. CMS025

Diagnosis
Error in accessing via HTTP
400 Bad Request
ICS:5015: The parameter authId is not a valid parameter for the serverInfo commandd

Solution

The solution was taken from the SAP Note 1879152 – CSADMIN: HTTP error: 400 Bad Request 5010: wrong usage,

• Transaction CSADMIN can only be used for repositories/archives which are running on an external SAP Content Server.
• If repository/archive is stored on a third party vendor product or in an internal system database table, the functionality of button CSADMIN inside of transaction OAC0 is not supported.