How the user details is migrated to cloud

[alejandra.romero]

How the user details is migrated to cloud.
We have migrated a large number of users, some of them has the verified email anothers don't. My question is, how the full name is filled at cloud when we migrated users. As far i understand there could be three posibilities:
1. Users that already have an atlassian account in cloud before migration. In this case, the full name should be the same as the user account, shouldn't it?
2. Users that didn't have an atlassian account in cloud before migration, and has the verified domain, at the full name in cloud appears first part of the email, everything before @. Is that correct?
3. Users that didn't have an atlassian account in cloud before migration, and doesn't have the verified domain. Appears in cloud as a full name the same as we had in server.

All the above are correct? If not, how is the behaviour with JCMA tool when migrated users?

Thank you!