I have two separate Google Apps domains that I would like to merge. Both domains are in use. One domain should act as the primary domain, and the other should be added as an associated domain.
To associate the second domain in the first, it needs to be available, but make it available I need to delete it in Google Apps. This would interrupt the mail flow and the user data would be lost. So I need to migrate this data first.
I can migrate the data and mail to temporary user account in the primary domain, but this does not solve the mail flow issue. And it is a two step approach, the users need to be migrated to the associated domain in a later stage.
This seems to be a catch 22 to me, I would like to know if there is a better approach.