export multidomain to another multidomain

Hi!
I read the documentation but I've a doubt.
I've this configuration:

Server A
Zimbra open source 8.0.3 with 3 domains
a.a.a.1
a.a.a.2
a.a.a.3

Server B
Zimbra open source 8.0.6 with 3 domains
b.b.b.1
b.b.b.2
b.b.b.3

now I've to export the a.a.a.x domains in the Server B, will ZMT keep b.b.b.x domains without delete them?

Thank you
Federico