Hello Gordon,
Please refer to this below link. This shall help you CME history report would not be so useful into CDR aspect.probably you can see some external application for that.
https://supportforums.cisco.com/document/36401/call-accounting-reporting-software-cme-and-uc500
Br,
Nadeem Ahmed
PS:Please rate all useful post.
Br,
Nadeem
Please rate all useful post.