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Closing due to inactivity and I gave the only answer and I believe the best solution.
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Closing due to inactivity and I gave the only answer and I believe the best solution.

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Issue: Mail changes not filtering down to two separate Outlook 2016 installations <br />
When the end user deletes or changes mail messages on his I-phone or Outlook 2013 laptop the said changes never make it to his remaining computers with Outlook 2016 installed. The changes however are replicated to the Outlook 2013 install<br />
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All computers are running in Outlook cached mode.<br />
The .OST files have been removed and recreated<br />
Exchange 2010 is the mail server.<br />
This is the only user affected
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Issue: Mail changes not filtering down to two separate Outlook 2016 installations 
When the end user deletes or changes mail messages on his I-phone or Outlook 2013 laptop the said changes never make it to his remaining computers with Outlook 2016 installed. The changes however are replicated to the Outlook 2013 install

All computers are running in Outlook cached mode.
The .OST files have been removed and recreated
Exchange 2010 is the mail server.
This is the only user affected

Outlook 2016 not receiving deletions or changes from Exchange 2010

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Windows Live Mail is the successor to Outlook Express, a discontinued email and news client bundled with several versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and available for Windows 95 and Mac OS 9. In Windows Vista, Outlook Express was superseded by Windows Mail, then again by Windows Live Mail as separate software. Outlook Express is a different application from Microsoft Outlook. Beginning with Windows Vista Microsoft included Windows Mail, based on large parts of Outlook Express source code.