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Outlook 2013 is correct. I set the user to only cache 3 months due to this taking a large amount of time set to 12 months. Since the cache only goes back 12 months I did not think this would help in the cause since he is searching back 8-10 years. I did remove the policy from this particular user this morning so that he does not have any type of archive applied. I am a little confused about what you are referring to as an archive mailbox. I have checked many accounts and I do not see an archive mailbox option. Keep in mind we paid for the E3 licenses for each user but we did not pay for the archive option. Not sure if that makes a difference here.
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I was incorrect on my last comment. I can see now that I can move the slider back to the &quot;ALL&quot; position and cache all of the email if I choose. This might fix the issue but will take a long time since he has 19GB. Do you agree that moving the cache slider to &quot;ALL&quot; could solve the issue?
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I have a user I migrated from on premise to Office 365. After the migration of a 19GB email box the user is experiencing issues when performing searches. The user can search for a specific name which should bring forth hundreds of emails from ten years past but the search only shows items within the last year. The migration was successful and the mailbox does show 19GB of email still exists. Need to understand why the account does not provide a full search.
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I have a user I migrated from on premise to Office 365. After the migration of a 19GB email box the user is experiencing issues when performing searches. The user can search for a specific name which should bring forth hundreds of emails from ten years past but the search only shows items within the last year. The migration was successful and the mailbox does show 19GB of email still exists. Need to understand why the account does not provide a full search.

Office Search

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.

Microsoft Office

An office suite is a collection of bundled productivity software (a software suite) intended to be used by knowledge workers. The components are generally distributed together, have a consistent user interface and usually can interact with each other, sometimes in ways that the operating system would not normally allow. Most contain a word processor, a spreadsheet, an email client and presentation software; some might contain a database program. Several office suites have their own topics: Microsoft Office, Office 365, LibreOffice (also known as OpenOffice), Lotus IBM and Google Apps.