SBS 2011 Reporting Wrong Client Free Disk Space

I recently started receiving email notifications from my SBS 2011 server telling me multiple computers on my network have dropped below their low disk space threshold, which is set at the default of 10%.

The odd part about this is that these computers all have over 30GB of free space on the C: volume, which is the volume SBS is reporting as low, which is completely not true.  These are standard client workstations running Windows 7 Pro and not a one is low on disk space.

To add more to this, these reports all show the C: volume size for these workstations to be 'Volume Size: 499278409728', which is also not true because these particular workstations all have an 75-80GB volume size.

It seems like SBS is not reporting the correct total volume size on the C: drive for these workstations, rather it is reporting them to have roughly 30GB less total disk space than they truly have.  

Here is what the email shows:

An alert was detected on your network. Further investigation into the issue is recommended.

Computer: CLIENT-COMPUTER
Date/Time generated: 4/3/2014 2:00:13 AM
Title: Percent Free Disk Space
Source: Performance Threshold
Description:
The free disk space on this computer has dropped below its notification for low disk space threshold.


Volume Name: C:
Free Space: 36956717056
Volume Size: 499278409728


Troubleshooting suggestions:

1) If the issue is being reported on the server running Windows SBS, consider freeing up the disk space by reconfiguring its disk using the storage tasks available  under the "Backup and Storage" tab in the Windows SBS Console.
2) If the issue is being reported on a client computer, consider freeing up the disk space by using  the Disk Cleanup and removing any unneccesary files on the computer.


Any information to help resolve these wrong reports is appreciated.  

Thank you
ColumbiaMarketingAsked:
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ColumbiaMarketingConnect With a Mentor Author Commented:
I resolved this myself by repairing monitoring and reporting in SBS 2011.
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