This is the typical scenario of my company. One corporate office with 18 satellite offices. The network here is basically comprising of Windows NT server PDC's (service pack 6) and BDC's and windows 2000 DC's. The huge problem I inherited from the past Network Admin is that he has NT and AD running in NATIVE Mode. The Network is in two domains, one AD and the other NT. About eight satellite offices has AD and the rest are win 2000 servers authenticating via the wan link to the corporate NT PDC. We still have legacy systems out there and the only way users are able to access resources b/w the two domains is by established trust relationship. We have a huge DNS issue here becuase the DNS server isn't configured currently and the native mode issue with NT.
Now we want to fix the problem. Bear in mind that the servers in the satellite offices running AD are DC's and working ok. But now we need to correct all the mess and move up to Win2003 AD. We still have Exchange 5.5 running on win NT. Please tell me how do we proceed... What should we expect and how can we overcome this Native mode road block in this upgrade. Just a head up, the management has ruled out any possiblity of restructuring/rebuilding AD from scratch.
Thanks for your kind assistance.