Sam me bateu nisso, como sua resposta veio enquanto eu estava digitando o meu. Como Sam recomendou, eu indicarei o pacote de transição , da Microsoft. Este artigo de conhecimento também pode ser muito útil, bem como este post , do qual cito uma entrada:
- Install Windows 2003 on a new computer.
- Setup TCP/IP using static IP and DNS pointing to the SBS DNS.
- Join it to the SBS domain.
- Install DNS and WINS (if you have Exchange and VPN connection, it is better to install WINS).
- Run adprep /forestprerp to extend your Active Directory forest's schema.
- Promote the Windows 2003 to be a DC by running dcpromo. When the Domain Controller Type displays, select Additional domain controller for an existing domain. then follow the instruction to finish the process.
- After rebooting the new DC, change the DNS and WINS point to the new DC IP.
- Make the new DC as a Global Catalog Server. To do that, open Active Directory Sites and Services. Expand Sites, Expand Servers, then expand NTDS Settings. Right click NTDS Settings for the DC and Click Properties. Check Global Catalog.
- Transferring the FSMO roles to the new DC. 1) Open Active Directory Users and Computers. Right-click on the domain name and selectOperations Masters. In the RID tab, click the change button to change the RID Master role to the new DC. Repeat this for each of the other tabs (PDS and Infrastructure). 2) To transfer the Domain Naming Master, Open Active Directory Domains and Trusts. Right-click on it and select Operations Master. Click the change button to change the Operations Master to the new DC. 3) to transfer the Schema Master role, follow these steps: a) Go to command line and run regsvr32 schmmgmt.dll, and then click OK. b) Run mmc, and then add Active Directory Schema. c) Right-click Active Directory Schema, and then click Change Domain Controller. Specify the new DC server name. d) Right-click Active Directory Schema, and then click Operations Master. In the Change Schema Master dialog box, click Change.
- Move the site licensing server from the SBS 2003 to the new DC. To do this, open Active Directory Sites and Services. Expand Sites and then click Default-First-Site-Name. Right-click Licensing Site Settings, and then click Properties. Click Change, type the name of DC in the Enter the object name to select area, and then click OK.
- Reboot the DC. Check Event ID 1119 or 1869 on the DC to make sure the DC is a GC.
- To remove the GC from SBS, open Active Directory Sites and Services. Expand Sites, Expand Servers, then expand SBS NTDS Settings. Right click NTDS Settings for Exchange01 and click Properties. Uncheck Global Catalog.
- Demote SBS. To do this, Click Start, Run, type dcpromo and click OK. Following the instruction. After that, the SBS will be a member server. To remove SBS from the domain, right click My Computer and select properties. Click the Computer Name tab and click the Workgroup radio button. Enter WORKGROUP for the new workgroup name and click OK. You will be prompted to reboot.
Resumindo, não vejo grandes problemas em uma migração do SBS 2003 para o Windows Server 2003 "regular".