Outlook Search options greyed out after updating to Windows 10 1703 (Fall Creators)


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]

Case open with Microsoft to work out why!

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