Separate real users from fake users
We have been using Smartsheet for several years and, in the past, project managers used to create fake users in order to be able to assign tasks to external collaborators that do not use the tool.
Fake users have been created with kind of fantasy names and fantasy email addresses, but with our real domain extension (skilledgroup.com).
Now I need to be able to separate real users from fake users (and I can't delete the fake ones). The only way I know is to filter by "member status" (all fake users cannot be ACTIVE because the email addresse doesn't exist) but I got some real users that still have to activate their user, so it is always required a manul intervention to get a representative lists.
The question, therefore, is: can I update the email of all the fake users, adding for example a sub domain (@ext.skilledgroup.com)?
If there's no way to do that, is it possibile to export users with the group they belong to, or similar?