https://userapps.support.sap.com/sap/support/knowledge/en/1814554
1814554 - BI 4.0 Launchpad SSO HTTP Status 501 Method OST | SAP Knowledge Base Article
When trying to login to BI 4.0 Launchpad using single-sign on Kerberos authentication some users receive the error "HTTP Status 501 Method OST" or "HTTP Status...