Determine the # of Outlook Client Users

I got another interesting question from my customer today.  How many users configured the CRM Outlook client?  Thanks to my PFE friend, KG, he provided us the SQL query to get that information. 

To get the # of subscription clients in CRM, you may execute the query against the [ORGNAME]_MSCRM database below.

 select distinct MachineName from SubscriptionClients