I hope you guys can help me with this question. We are moving our Exchange 2003 from our datacenter to a ISA hosted datacenter and moving to Exchange 2013. I need some recommendations and best practices to make sure that during this transition email service is not disrupted.
With the new servers not being on the same domain and not in the same network I do not know how this would be accomplished.
Can someone please provide me with some detail information/articles that would step though this process.
Thanks in advance.