I've LMS 3.1 with patches cwa1.1.0-win-CSCsv592911 and CSCsu84143-01 installed on a customer. I'd configured almost everything on LMS, registered about 60 devices on CS and customer has used LMS for some days.
After rebooting windows, all devices on CS (on CS > Device and Credentials > Device Management) disappeared!!!
Does anyone knows what can be wrong? Is this a common error? Is there any way to recovery (don't have backup)?
Your ACS integration is broken. Until you fix it, you will not be able to manage any of these devices in LMS. Alternatively, you can break ACS integration, and all of the devices will be visible again.