Delete Contacts in CRM will it delete Customers in Support if Synced

Delete Contacts in CRM will it delete Customers in Support if Synced

Hello

I had a number of test Contacts in Zoho CRM that I deleted out and assumed when it synced with my Customers in Support that they would also delete from there.  This doesn't seem to occur.  Is there something specific I need to do?  Does the field "contacts modified after" affect this in some way?

Thanks
KW