We got a couple of OS X 10.11 machines, that where enrolled in a different MDM (we cannot access anymore)
Since there is a lot of data on the drives we do not want to wipe the machines
Is there a trick to get rid of the old MDM profile ?

"Normal" profile removal via bash fails with error "Profile is not removable"

bash-3.2# profiles -R -p com.uni.mdm
profiles uninstall for identifier:'com.uni.mdm' and user:'root' returned 101 (Profile is not removable.)