I think you should probably open up a case with Cisco Tac. I had a look on the Bug Toolkit and noted 51 Bugs associated with DMA problems on the CCM 5.X train. You might be hitting this one (that does not list any workaround);
CSCsf21021 Bug Details
Headline DMA 5.0(4)ES1.1 backup failed:W1 migration verification & DB in IDS veri
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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 ...