I've applied a working device template to several file servers, and while it has populated the CPU and Memory Util monitors, the Free Disk Space monitor refuses to show up.

I've even added both SMTP and WMI monitors, and neither works for Free Disk Space. (please see attached)

This is the Windows Server 2012 R2 device template, and it works perfectly fine on other servers, so it's clearly something up with these specific servers.

Any suggestions as to what the issue could be?

Thanks in advance!
Mat