My forest includes 4 sites. One of them has Exchange 2003 while the others have Exchange 2010.
I created 3 RGCs between Exchange 2003 & other 3 sites of Exchange 2010 with cost 1 for all.
But unfortunately, Exchange 2003 always uses the same RGC & ignore the others.
Therefore, kindly advise how I can force Exchange 2003 to use the proper RGC to the outgoing emails.
Thanks in advance!