YOU ARE THE MAN!   I've been working on NPS/RADIUS authentication going on two weeks now having issues with Windows 7 and non-domain clients authenticating correctly.  I was running in to the same exact issue you were (reasoncode 23, etc) and couldn...

Agreed, I'm hoping this issue doesn't extend to other Android L devices. 

Hey, the 10.6 APK available on Cisco.com downloads can be installed on the Nexus 6 outside of the Google Play Store.  Annoying yes, but at least I have Jabber installed again. 

I'm running the same version of Android L on my Nexus 6 and I also can't download Cisco Jabber from the Play Store.  It had been working flawlessly up until this point...