Logging into the VIP Manager IdP portal on the VIP Enterprise Gateway fails with "You have entered an invalid username and/or password. Re-enter the information and try again.
VIP Manager IdP server.log shows:
..."actor=JohnDoe ,op=Authentication,text=VIPMGRIDPFirstFactor:: Patern not Matches"
..."actor=JohnDoe ,op=Authentication,text=There is no mail attribute configured for the user with filter (&(&(&(objectClass=user)(objectCategory=person))(sAMAccountName=JohnDoe ))(|(memberOf=CN=VIPMgr_high\,OU=Application\,DC=example\,DC=net)(memberOf=CN=VIPMgr_ViewOnly\,OU=Application\,DC=example\,DC=net)))"
In the above example, the trailing whitespace following the User ID is used by the end-user and causes the failure.
Check for white spaces and unusual special characters in the user ID.
To confirm: Copy the user ID, verbatim, from the log file, then check it using the TEST button in the VIP Administrator Configuration settings.