Ev to Archive from two different domain

Hello,

We have senario where we are still archiving from Domain A's Exchange. But customer moving Mailboxes from Domain A's Exchange to Domain B's Exchange. Two way trust in place.

Senario is, migrating mailboxes going take some time so they want to archive from Domain A and Domain B(migrated ones) while EV still sits in Domain A.

I found this article below. But not the same I guess.

https://www.veritas.com/support/en_US/article.100038235

Second querry is about migrated mailboxes how I can relink them old Vaults?

Thanks

vaultlearner.