After setting up SAML2 with signing, the follwong error is seen in the PC_HOME/sso/logs/SsoService.log:
ERROR | qtp1649115615-37 | <timestamp> | common.sso.saml2.UserAssertionService
| Receive StatusCode: urn:oasis:names:tc:SAML:2.0:status:Requester. Message: Invalid signature
And login fails for SAML2 authenticated users.
There is a mismatch between the Metadata/Certificate information the IDP has from CA Performance Center
CA Performance Management
SAML2 authentication with signing
Make sure the documentation is followed closely and the IDP has up to date Metadata from CA Performance Center (CAPC)