Our confluence self hosted has a user directory connected to our jira self hosted user directory (crowd)
We have +/- 100 real users
We have 6000 JIRA service desk customers ( spam coming into monitored maibox)
JIRA migration assistant migrated those spam customers to real service desk customers (the are not present in admin.atlassian.net directory
Now trying to migrate confluence and it requires us to trust the domains of the 6000 users ( https://support.atlassian.com/migration/docs/review-users-to-trust-email-domains/ )
IMHO, confluence migration assistant should ignore those "users" and should only try to migrate "real" users belonging to the confluence-users group.
PS: Im using CCMA v3.4.14 not selectable in combobox
Thanks to support for answer and workaround;
You first need to trust all those thousands of email domains coming from your jira service desk customers ( spam or not it does not make a difference) to be able to move to the next step of the migration wizard
... where you can choose NOT to migrate those users...
No bulk editing to trust the email domains.....
Asked my son to help me to click to trust those 3000 domains to be able to ignore them.
Thank you for sharing the answer you discovered through the Atlassian support team with the rest of the community, @Etienne Charlier 👍