Dear,
I would like to migrate my Winnt4/exch5.5 to win2003/exch2003
here is my actual LAN config :

Site1
Site2
Win NT4 PDC with exchange 5.5 -----------------------------------> TRUST
Win NT4
WINNT4 BDC

Now i would like to change the PDC on site 1 and exch5.5 to a new windows
2003/exch 2003.
how can i migrate users and mail boxes to the new win2003 server and keep
the trust between the two sites.
Regards