Hi,
An unusual issue that I encountered today, after doing an in-place upgrade using Setup.exe we found that Outlook advanced search had stopped working:
This was caused by the migration losing keys relating to Windows Search preferences, it looks like they were incorrectly added to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Search\Preferences rather than
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\Windows Search\Preferences
Re-importing the keys restores the functionality once Outlook finishes re-indexing:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\Windows Search\Preferences]
"{4154494E-BFF9-01B8-00AA-0037D96E0000}"=dword:00000001
"{C0A19454-7F29-1B10-A587-08002B2A2517}"=dword:00000001
"{70fab278-f7af-cd11-9bc8-00aa002fc45a}"=dword:00000001
"{c34f5c97-eb05-bb4b-b199-2a7570ec7cf9}"=dword:00000001
"{0077B49E-E474-CE11-8C5E-00AA004254E2}"=dword:00000001
Case open with Microsoft to work out why!