3135666 - Error "401 unauthorized" with "Access denied" when accessing documents on content repository on SAP System Database due to System PSE changed

• Error "401 unauthorized" with detail message "Access denied" ("Zugriff verweigert" in German).
• The involved content repository is on SAP System Database.
• Same error may happen in testing by report RSCMST, RSCMSTH0, etc.
• The error may occurred after the System PSE is changed.
  
  
• No error occurred in transaction CSADMIN>open the content repository.
• The username and password is maintained in ICF service or external alias "/sap/bc/contentserver" is correct and not locked. The 401 error was not caused by the logon issue of the ICF service or external alias.
  This can be verified by transaction CSADMIN>open the content repository. If there is logon popup, it means logon issue of "/sap/bc/contentserver", but not the sigunature error which is focused in this KBA. And, regarding the logon issue of "/sap/bc/contentserver", please check the resolution part in KBA 3054157.

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SAP Netweaver release independent.

SAP NetWeaver 7.0 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0

401 unauthorized, Access denied, Zugriff verweigert, OAC0, CSADMIN, /sap/bc/contentserver , KBA , BC-SRV-KPR-CMS , Content Management Service , Problem