Hello...I am planning an upgrade from SBS 2003 to 2011 and will use the fantastic instructions as documented by dematzer below:
My question relates to a Server 2003 R2 (S2K3) DC I have configured within the existing SBS 2003 domain. If possible - to spread out consulting costs for my small business client - I would like to retain this as an existing DC within the upgraded SBS 2011 domain. This S2K3 machine also functions as a BlackBerry 4.1.7 Enterprise Server as well as a CA eTrust v8 AV Management server. I will also leverage the existing SBS 2003 server once it's decommissioned as the SBS 2003 computer from the upgraded domain, but that will likely be a Server 2008 R2 member server for the short term, then over time I will migrate the BES and AV Management server roles to this rebuilt machine.
Is there anything special I will need to do for the S2K3 DC to remain a viable DC in the upgraded SBS domain or will following the SBS 2011 upgrade steps as outlined by dematzer result in the S2K3 DC running fine under the upgraded SBS 2011 domain? My assumption is that the S2K3 DC will run fine as it should theoretically be no different than running S2K3 DCs that co-exist with Server 2008 R2 DCs, but SBS I know can have its "subtle" differences when compared to the full Windows Server products.