Microsoft outlook offline folders not updating
Other "clues" I've found are: Go into email account setting and set your server from IMAP to POP. IMAP mirrors the service providers server and some service providers dump your emails after 2 weeks regardless of your setting. Would you like to answer one of these unanswered questions instead?
Mergix - find and merge duplicate contacts everywhere.
In particular, for best performance, you should ensure that you enable only the minimum required entities and views for offline use in Dynamics 365 for Outlook.
For more information about customization, see the Customize your Dynamics 365 system.
Users who log on locally to a device that has Microsoft Dynamics 365 for Outlook installed can potentially access Dynamics 365 data stored locally.
Shared use of a device running Dynamics 365 for Outlook is not supported.
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You can set Auto Archive to move or copy old items to a designated archive folder or to automatically delete items.