Dear all Experts,
We need to migrate our exchange 2003 to a new server with exchange 2010 and windows server 2008 R2 but we are different story than others.
We are using windows 2003 server std sp2 with exchange 2003 std.
We have 3 different company but only one exchange server, we have a default domain (@abc.com) and set other two domain in exchange email-address(policy) say @xyz.com, @123.com all DNS point to the same server by ISP. All colleague have different username to access that 3 different email address.
What we need is a big change.
1) we want to use @123.com to be the default domain instead of @abc.com
2) we want the colleague only have one username which can access all email (alias)
3) we want the colleague can choose which email address to be sender in outlook 2010
4) how can we first setup the @123.com in new server which won't effect others.
I am really newer, can anyone guild me step by step which I really have no idea what to do