This directory partition has not been backed up since at least the following number of days

Hi,

We have a fairly new 2012 R2 Essentials server, with a RAID1 array.

In addition, we're backing up critical business files to an external hard drive, via Windows Server backup, and we have recently seen the following message in health reports:

This directory partition has not been backed up since at least the following number of days.

Directory partition:

DC=ForestDnsZones,DC=[xxxxxxxx],DC=[xxxxxxxx]

I just wanted to verify that this is referring to our lack of a Full Server or System State backup but that the backups we are doing are still running successfully. In fact, server backup is reporting successful backups, but I just make sure I understood the meaning of this alert. 

In the meantime, I am urging that we do a full server backup asap.

Thanks.