"Off Cluster CDR Connection String?This parameter specifies the optional DSN to use when you do not want CDRs inserted into the CDR database on the publisher. This parameter must point to an ODBC database with matching CDR database schema. The DSN should include any necessary user and password information. You do not need to run the Cisco CallManager installation process on the ODBC database."
You might also want to check this link from microsft to determine the DSN you have to enter in there.
Please check the link from Microsoft I sent you to see more detailed information on this.
To verify the files are being inserted properly, you can check the C:\Program files\Cisco\CallDetail\CDR and C:\Program files\Cisco\CallDetail\BAD folders continously (if you have any doubts) and you should have few files in the CDR folder or none and none for the BAD folder.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.