Move user to other domain

I have set up a virtual server in my domino server directory to host a second domain.Say my primary domain is domainA and the other domain is DomainB.

I am using Directory Assistance with 2 NAB’s - one for DomainA and the other for DomainB. Let’s call them NAB_A and NAB_B

I have 2 users in the NAB_B that belong to the virtal domain DomainB.

For various reasons I decided to set up a new Domino server for domain (DomainB) instead of the virtual one.

What I need to know is:

  1. How to move the 2 users from NAB_B in DomainA to DomainB along with their mail files.

  2. How to remove NAB_B from DA in DomainA after the users have been moved to DomainB