Are there two different Outlook search utilities?

Running Outlook 2007 on a Windows 7 platform, I recently disabled the Windows Search Email Indexer COM add-in in Trust Center.  This appears to have improved some performance issues with Outlook.  Messages are still being indexed, and instant search is still working.  I am just curious as to whether the Windows Search Email Indexer COM add-in is a distinct function from Instant Search?
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ddantesAsked:
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Felix LevenSenior System and DatabaseadministratorCommented:
In Outlook go to Tools > Options > General tab > Search options. Now uncheck all folders.
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ddantesAuthor Commented:
Thank you for your comment.  I think I didn't phrase my question completely:  I don't want to prevent Outlook from indexing my Email.  However, if Windows Search Email Indexer is a separate function from Instant Search, I would like to keep it disabled, and maintain only the Instant Search.
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Felix LevenSenior System and DatabaseadministratorCommented:
Instant Search is an extension of Windows Desktop Search (WDS) build into vista/win7.
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ddantesAuthor Commented:
Thank you for that info.  So, for clarification, Instant Search will continue to perform its independent function, regardless of whether or not the COM Add-in "Windows Search Email Indexer" is enabled?
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Felix LevenSenior System and DatabaseadministratorCommented:
yes, Windows Desktop Search installs a MAPI Protocol Handler. This handler is responsible for indexing data in earlier versions of Outlook (pre Outlook 2010).

But indexing of emails will stop! Outlook 2010 has it's own indexing build into the programm, 2007 not (maybe this changes with some SP, but i dont't know).
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ddantesAuthor Commented:
Sorry, I am confused now.  If Instant Search (Windows Desktop Search) is a function distinct from Windows Search Email Indexer, why would Instant Search stop indexing Emails when Windows Search Email Indexer add-in is disabled?
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Felix LevenSenior System and DatabaseadministratorCommented:
The add-in enables wds to index the emails in outlook. Outlook 2007 can't index emails. So emai indexing depends on WDS + Add-In.

Outlook 2010 disaables the Add-In by default cause it has its own indexing build in.
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ddantesAuthor Commented:
OK, thank you for explaining.
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