Very simple if you know, but i've searched high and low on MS's site and this site. I saw a post that is the same but didn't offer exactly my answer at this link:
I have Exchange 5.5 with Organization name of Meritage, Inc
I configured ADC then realized my Org name has a comma in it. I fixed this in ExAdmin on the Ex Server, but it doesn't seem to be replicating to AD because i still get the error:
Setup has detected that the Organization name of the exchange site you are currently trying to join or upgrade does not match the Exchange Organization found in the Active Directory.
When i install Ex2K.
Please help. I'd greatly appreciate it.