Hi Daniel,
This cannot be changed via Bulk Edit, but you can use the method shown below :)
To Assign or Reassign Subscribers to a Class of Service
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Step 1 In the Cisco Unity Administrator, go to any Subscribers > Class of Service page.
Step 2 Click the Find icon.
Step 3 Double-click the name of the class of service to which subscribers are currently assigned.
Step 4 Go to the Subscribers > Class of Service > Subscribers page.
Step 5 Click Assign or Reassign, as applicable.
Step 6 Enter the name of a subscriber. You also can enter * for a list of all subscribers, or enter one or more characters followed by * to narrow your search.
Step 7 Click Find.
Step 8 From the list provided, select the names of the subscribers to be assigned or reassigned. To select more than one name, hold down the Ctrl or Shift key.
Step 9 Do one of the following actions, as applicable:
•Click the Assign button.
•Select the applicable class of service, and then click the Reassign button.
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/5x/administration/guide/ex/5xcusag170e.html#wp1048475
Hope this helps!
Rob
