Remove Dial Plan Error

Hello,

I'm trying to remove a dial plan in Exchange 2013, but it keeps telling me that "This dial plan is associated with server SERVER_NAME."  I've tried removing it thru EAC and powershell using remove-umdialplan, but both of them fail stating that it's associated with one of my servers.

I ran get-umcallroutersettings on both of my Exchange 2013 UM servers  and the DialPlan parameter is set to null on both.  

Is there another spot in the EAC that ties the server to the dial plan?  

Thank you,

Zach