The SBS migration wizard may fail to run with the following error:

[3252] 081121.114613.4453: Setup: Initializing...C:Program FilesWindows Small Business ServerBinMigrationWizard.exe
[3252] 081121.114614.0382: Setup: Built-in
Sid=S-1-5-21-1608368076-786163300-1527642931-500
[3252] 081121.114614.0382: Setup: current
Sid=S-1-5-21-1608368076-786163300-1527642931-1511
[3252] 081121.114615.0210: Setup: Exiting Migration Wizard since the source OS isn't supported.

In the sbssetup.log file, check for the following error:

[3424] 081106.100113.9360: Setup: Caught exception when getting source OS Version:
System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at System.Management.ManagementScope.InitializeGuts(Object o)
at System.Management.ManagementScope.Initialize()
at System.Management.ManagementObjectSearcher.Initialize()
at System.Management.ManagementObjectSearcher.Get()
at Microsoft.WindowsServerSolutions.Setup.SBSSetup.SchemaUpdatePagePresenter.PopulateSourceServerOS(String sourceServer, String username, String password)
[3424] 081106.100113.9360: Setup: Setting source OS to Other

Notice the ACCESSDENIED
 

 

 

On the source 2003 server, run dcomcnfg

Double click component services
Then computers
Then My Computer

Right click on My Computer and go to Default Properties tab

Make sure that the box labelled "Enable Distributed COM on this computer" is checked.

If this box is unchecked, checking the box will fix the root cause of the failure but still won't allow the migration wizard to run.