behavior of existing data when excluding a vm

[Lee, Gary]

Tsm server v7.1.7.1, client 7.1.6.4.
Unsure of TSM for VE version.
I need to freeze the backups of a VM in their current state as of today.  I can 
exclude the vm from backup.  However, will this act like an exclude and cause 
all backups to become inactive?
If so, how to stop backing up a VM but leave its existing backups alone.