Hello Coreyrandall,
Thank you for visiting the Cisco Support Community!
Here is a link to the CME complete support file set for the 8.6 firmware version (scroll down to select 8.6 version). In addition, click here for more information about the CME 8.6 supported firmware, platforms, memory, and voice products (scroll down to 8.6 version), and click here for the CME features roadmap.
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Best,
LP