Is it safe to delete devices in the system tenant?

Document ID : KB000117949
Last Modified Date : 23/10/2018
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We had a question about devices in the system tenant. Traditionally, we’ve had all of our application servers in the system tenant because the CA MDM client is installed with the server. My understanding is this was used for replication. However, we have replication disabled. My question is, does it hurt anything if we delete these devices? Most of them apparently stopped communicating in production some time ago, so as far as I can tell that hasn’t hurt anything.
If the devices are MDM servers, the effect of deleting these devices is not known.
There is code that behaves differently if it finds Client on a server (during install/upgrade stage).
We do not recommend deleting these devices.

Please note that bug fixes that will be delivered in future that ConnectionMonitor of CAMDM Client on the server will attempt a connect even though replication is disabled. This will be fixed in future releases.
So, if you don’t want CAMDM Client on the server to attempt any connects, the safe solution is to stop the CAMDM Client Service.