Exchange 2010 / Outlook 2010 - search results not returning everythig that it should

Hello,

We are running an Exchange 2010 server.  I have an Outlook 2010 client that is experiencing the following issue:

When user conducts searches, he is not receiving the full results.

Action taken:
- Completed a re-index.  It took a few days to complete, but the results are no better.
- Setup new profile.  This also took some time to synch up with the server and complete indexing.  However, the search results are still not listing everything that it should.
- I've verified that the option to limit search results is not checked.
- I have created a separate profile that is in non-cached mode.  This DOES return all the results that it should.

What further action could I take to address this issue?

I'm not sure if this is related, but the problem appears to have started after indexing was done on the Exchange server followed by a Information Store stop/start.  This was done because searches using the Discovery Tool was not returning all results.  

I really would like to switch back to the cached profile.  

Thanks in advance.

Regards,
Real-Timer
realtimerAsked:
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Michael MachieConnect With a Mentor Full-time technical multi-taskerCommented:
Its funny, I literally just ran into this with a VP a couple hours ago.

The 'Windows Search Email indexer' add-in was not enabled and after enabling it more results displayed. This was because when he searched the mailbox and the add-in was not enabled, the results were taking literally an hour to display everything as Outlook needed to search all emails for that criteria in order to display them in a timely fashion. Did you allow the search to continue for an extended period of time? If yes, did you cancel the search before it completed displaying all results?

Not saying enabling that add-in will fix your issue but if you can verify it is enabled we can tick that off the list.
outlook -> File -> Options -> Add-Ins -> Check to see if 'Windows Search Email indexer' is listed.
If not:
At the bottom of the Add-Ins window:
['Manage:' drop down] Disabled Items -> Go...
In the little window that appears you may see ''Windows Search Email indexer'. If you do, Select it and click 'Enable' to the left of 'Close'. Then 'Close', 'OK', Re-launch Outlook and re-search.

If 'Windows Search Email indexer' is not seen anywhere then that could be your root issue because that Add-In searches your .OST, which is essentially your 'Cached' data file.
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Michael MachieConnect With a Mentor Full-time technical multi-taskerCommented:
Outlook 2010 on exchange 2010 has a known limitation when searching. Some service packs only allow up to 50,000 instances of the search criteria to populate  and other service packs allow up to 200,000. However, I have personally identified a limitation of 20,000. So, if you search for the letter 'A', a max of 20,000 random instances of 'A' will populate. The remaining will not be found.

Narrow your search down by adding as much criteria as possible to the search as possible and you must be exact in your spelling.
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realtimerAuthor Commented:
Thanks.

I've tried a search for "FirstName LastName".

On cached, this returns about 10 messages in the year 2016.
In non-cached, it returns about a hundred going back to 2014.
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Lisa Hendrickson "CallThatGirl"Connect With a Mentor MS Outlook ExpertCommented:
Might want to make sure the computer indexing is setup right too. I have found that to be a mess. Go to the control panel on the pc/ go to Indexing and be sure the path is correct.
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realtimerAuthor Commented:
The issue still remains.  However, I think it would be fair to award some points for the assistance.

Thank you.
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