Outlook 2010 Mail Indexing Not Working (Windows Search Email Indexer Add-in cannot be enabled)

Are you running Outlook with Administrator privileges?

Go to C:/program files/Microsoft office/office 14

Right click on outlook icon ->properties-> uncheck” run as administrator “under privileges section.

Now enable the windows indexing and check if it works.

You can also check the thread link for more information:http://social.technet.microsoft.com/Forums/en/outlook/thread/1ca99ecf-5a31-4af5-8b3f-48c8112b4546

Yes, I had already tried this and all of the recommendations on the:http://social.technet.microsoft.com/Forums/en/outlook/thread/1ca99ecf-5a31-4af5-8b3f-48c8112b4546 thread - to no avail. 

In fact, I've had so much trouble with 64-bit Outlook that I've just uninstalled it and replaced it with 32-bit.  There are NO plug-ins or 3rd party applications (Aug2010) that work with 64-bit yet - and most vendors have no release dates in sight.  I also found the Microsoft recommendation (http://blogs.technet.com/b/office2010/archive/2010/02/23/understanding-64-bit-office.aspx) to use 32-bit if you have any need for 3rd party components (WebEx, Salesforce, Adobe, etc...).

Thanks for your help.
JB742

What is the format of the PST file is it 97-2003 or outlook PST file?

Click on the link below to know the difference and to find the format:-

http://office.microsoft.com/en-us/outlook-help/create-and-use-pst-data-files-in-different-versions-of-outlook-HP001231987.aspx

Thanks Jasongst--I have Win7/Outlook 2010, but when I tried your suggested solution, I didn't have a "use Cached Exchange Mode" as one of the options anywhere under "change."  Am I doing something wrong?

Thanks for any suggestions.

Found a solution! For me, at least. Forget the disabled addon, you need to enable Cached Exchange Mode.

Here is where it's located on my Win7 / Outlook 2010 box:

Control Panel >> Mail (32-bit) >> E-mail Accounts… >> Change… >> Use Cached Exchange Mode

Check the Use Cached Exchange Mode box, finish out and close the wizard, then quit Outlook and restart it. It should start caching your messages locally. Not only does this make Outlook searchable from Windows Search, it also makes your Inbox significantly faster, especially the instant searches.

I already was in cache mode but what I've found interesting is if I turn it off then my issue of not being able to search goes away.  Yet if I turn it back on the problem comes back.  So my solution was the complete opposite to yours which I find very odd.

The exact same thing for me!  If I turn off cache mode, it started working again.