After disaster recovery testing, some Outlook Clients cant use MAPI for Exchange

Following a procedure for testing exchange failover to a replicated server, my the domain computer account fo rmy exchange server was deleted.  Also the Exchange server was removed from the domain and rejoined.  Most of my clients are fine but some (almost all at one remote site with a separate functioning and replicating domain controller) cant use MAPI for exchange.  Anyone know how I can tell what might be wrong?
SMP123Asked:
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tmeunierCommented:
Well, removing the machine from the domain and rejoining it, makes it appear as a different machine as it'll have a different SID, even though the IP address(es) and hostname are the same.  I would actually expect there to be some problems.  Delete and re-create the MAPI profile in control panel > mail on these workstations, and then you should be in.
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SMP123Author Commented:
Yea I was uneasy with the procedure when I did it but was told that it has been successfully done in the past.  My gut tells me I have a computer account sid problem too.  It seems to me this procedure should really only go one way and not back again.  I am in the process of moving the small percentage of users having troubble onto another exchange server.  Interestingly though a reinstall of outlook does not resolve the problem.  
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