Oct 25, 2018 1:26 PM - edited Oct 25, 2018 1:28 PM
Thousands of contacts make it hard to go looking for Deactivated Users when filtered by Owner is Known.
Add another filter where Owner is none of [and select every user].
This should give you only Owners who are Deactivated Users.
Save the Filter as Deactivated Users (knowing you'll need to update the filter as new Users are added)
This is admitedly a pain if you have many users but works. Would be easier if there was a way to select all checkboxes in a filter.