Since me and one of my colleagues just spend a Friday night searching, an extra post/article could be helpful for others.
Our issue was caused by using two versions of the SBS 2008 DVDs. One with SP integrated, and one without. In the new DVD, the SourceTool has been updated.
An important change is that the new tool has an installation package (SourceTool.MSI) while the existing one is a standalone executable (SourceTool.exe). This MSI package needs to be installed on the source domain controller. The new tool must be used with the new media. The new tool will work with older media, but not the other way around.
by: Mark_Lawson on 2009-11-28 at 04:57:54ID: 6008
Thanks 3WT - you just saved me the pain of a similar Friday night search.
It is worth noting that merely running the new SourceTool.MSI on top of a previously updated source server and reboot is sufficient to allow the migration to proceed. Some of the information out there had me dreading that I might have to roll back the source server to before the SourceTool.exe had been run on it.
Thanks again
Mark