I have a question about PDC en BDC installation. On my PDC as well as on my BDC (about 100 Km distance between them) is Exchange 5.5 installed but on my BDC with the service pack 3 and on my PDC with service pack 2. Unfortunatilly I had to shut down my PDC and my BDC did take over the services. No my interventions upon my PDC keeps giving errors because there is a difference in version in some dll files. By example I can't change SMTP adresses in the exchange server. I always have to connect to my BDC to change mailboxes. Is there an other solution for this problem? This is very urgent! I hope someone can help me8! Thx