Hello,

This weekend, we have to accomplish a pretty serious task - upgrading a Exchange 5.5 
Server on one Domain, and somehow convert/migrate it to Exchange 2000 on another 
domain.

What would be the best way to attack this problem?  Create a Trust Relationship so the 
2 domains can talk to each other first?  -or- Temporarily have the 5.5 Server (or vice 
versa) join the other Domain temporarily?  I think that may break the server however - 
because the Admin Authentication would get screwed up as the service starts using the 
Domain Administrator login account right?  I need a bulletproof way to accomplish this 
task, as there is no room for screw ups right now.

One thing in our favor, is that we are not upgrading the server itself - so the 
original data files will always be intact - with no chance of corruption.  But still 
my Monday, we have to have all the users moved over to the new domain, and working off 
of Exchange 2000.

If the experts on the list could jump in briefly, and offer some really good advice on 
this topic, I would greatly be in your debt.  Thank you in advance for any help you 
can offer to me.

Mike -



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