Client-side rules

Thanks for your reply EricStarker 

When I run a get-inbox on a mailbox and look at any rules with the value supportedbytask set to false, those always seem to match the client side rules.  I went as far as making a new rule client side and converting another rule to server side.  And I discovered  the change was picked up by my one-line script.

Get-InboxRule -Mailbox <mailbox> | where {$_.supportedbytask -eq $false} |select Identity, Name

Do you have any idea what the supportedbytask is?  I feel like I have stumbled onto something but I would like an experts opinion.