In our lab we have been unable to succesfully join an Exchange 2000 server into an existing 5.5 site running SP4. All that is required to make this setup work is downgrade to SP3. I was hesitent to believe this was the problem, but we have relicated this setup twice in the lab. Is this documented anywhere?
List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm