SBS 2003: Exchange 2003 Change Mode

Change from Mixed Mode to Native Mode

The switch to native mode cannot be reversed.

1. Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. Right-click the organization, and then click Properties.
3. Click the General tab, and then click Change Mode under Change Operations Mode.

Further information:

Microsoft Support: How To Convert from Mixed Mode to Native Mode in Exchange

SBS 2003 – Windows 2003 Change Domain & Forest Functional Levels

This Blog: SBS 2003- Windows 2003 Change Domain & Forest Functional Levels

Microsoft Support: How to raise domain and forest functional levels in Windows Server 2003

Microsoft TechNet: Functional Levels Background Information