This might be very stupid but I cannot find any conclusive reference to answer my questions. First of all my network: NT 4.0 PDC and BDC then an NT 4.0 server running exchange 5.5. My plan is to upgrade the PDC then the BDC to 2k server leaving it in mixed mode leaving me with one non DC nt 4.0 server running exchange 5.5. I then plan to upgrade the OS on the last server to 2k server. At this point is where I have the questions and am looking for reference. After the last step do I then run ADC prior to upgrading to exchange 2k? Does the server running exchange need to be a DC? Do I need to have a different server with exchange 2k installed before running ADC? There are no hardware issues with the server running exchange so I cannot replace it. I have to use just the hardware I have now. My problem is that I read one thing on MS site and my books from Sybex and such say slightly different things which could be potentially devastating if this upgrade goes awry. So if someone can point to some reference and say "this is absolutely what you need to do" I would really appreciate it.
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