Here are some useful debug parameters (in NOTES.INI) in case of Quickr authentication issues:

On the Quickr Server:

QuickPlaceUserDirectoryLogging=5
QuickPlaceAuthenticationLogging=5
QuickPlaceDSAPILogging=5
– Requires restart of server
– Output is to <path to Domino data>\IBM_TECHNICAL_SUPPORT\console.log

On the Domino LDAP server (in case you are using Domino LDAP…)

Ldapdebug=7
– This setting is for the LDAP server, not Quickr
– Requires restart of server
– Output is to <path to Domino data>\IBM_TECHNICAL_SUPPORT\console log