Outlook 2016 w/ Exchange 2007 Searching ONLINE mode: reliable?

Outlook 2016 w/ Exchange 2007 Searching ONLINE mode: reliable?

On Exchange 2007, we created copy of all email from & to every user (by quarter).

I was asked to produce all email To & From a particular user.

Using Outlook 2016 in online mode (can't cache because that quarter's copy is 70 gigs), I sorted the entire "inbox" by From and see that there's 528 messages From the user.

However, I used Outlook 2016's search (online mode) for all mail from, to & cc that user) and THEN sorted the results by FROM and came up with only 454 messages.

In the past, when we were using Outlook 2007 we concluded that searching was not reliable.

I thought it might have been fixed in 2016.

Am I missing something?

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David Johnson, CD, MVPOwnerCommented:
I think your process is flawed Putting all of your eggs in 1 basket and then searching through that haystack for a collection of needles is a tremendous strain on your resources. Instead put everyone on a litigation hold and let the system use its normal archiving rules.   Easier to grab a collection of needles from a needle container than searching the entire haystack.

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mike2401Author Commented:
Note: We are not using Office 365 microsoft hosted.

I think "litigation hold" is a feature of the online offering.

Will SzymkowskiSenior Solution ArchitectCommented:
When you are using Outlook in Online mode you are using the Searching Mechanisum on the Exchagne server which then has to present the results to your Outlook over the network. FOr 70GB mailbox this could take time. Have you tried to perform this via OWA?

I would suggest doing that. You can also re-create a new Outlook profile as well.

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David Johnson, CD, MVPOwnerCommented:
Litigation hold has been available since Exchange 2010
mike2401Author Commented:
Thanks Will.  Ultimately, we wanted to copy the desired messages to a PST so OWA wouldn't be  helpful.

It's a brand new profile.

This time I did it in outlook 2013; previously we did it in outlook 2007 and then concluded that searching wasn't robust.
mike2401Author Commented:
Since we are running Exchange 2007, and have not invested in a fancy e-discovery or other solution, I told my boss with the tools we have, we can only produce a reliable set of email FROM particular people, not TO particular people; we're going with that.

We hope to be migrating to Office 365 next year so this shouldn't be an issue in the future.

mike2401Author Commented:
Thanks for your comments.

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