Chatted with the core and messaging folks about this particular error - they think you may need to contact TAC on this one.
One thing they did suggest was to install CiscoUnity3.1(5)_ES52. CSCed89501 (which was fixed in that ES) adjusts for a similar exception in the ExchangeMonitor. They don't really think you're hitting CSCed89501, though, because it was limited to earlier ESs in the 3.1.5 branch. However, the work for CSCed89501 improved exception handling in the ExchangeMonitor overall which would certainly help run this down.
You'll want to contact TAC to get hold of that ES and go from there.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...