It would be helpful for those who are frustated with updating number of clients with exclusion and exceptions to exclusion in Netbackup (7.x Onwards).
Here i would demonstrate how you can achive this by making use of Hidden Option of Global Exclude / Exception Lists.
Open Netbackup Administratration Console
Browse Hosts Properties - Clients
Select all the clients where Exclusion and Exceptions to Exclude lists needs to apply.
Right click on selection and select Properties.
Navigate to Windows Client - Exclude Lists
Now on under Exclude Lists
Click on Add
Specify the Policy(ies), Schedules and the path (File / Folder /Drive) to be excluded
Now after you added the exclusion it should be highlighted with Golden Color.