Download the job aid corresponding to the email client that you use. If you do not know which client you are currently using, see "How do I identify the version of Outlook I'm using and the job aid to follow?" on the FAQs page.

Outlook on the Web for Business (Office 365)
Outlook 2016
Outlook 2016 for Mac
Outlook 2013
Outlook for Mac 2011
Outlook 2010

Other Helpful Documents and Links

Records Management Website
Email Retention Presentation
Policy BUL-6825.0 Records Retention and Destruction
Office 365 Home Page
New Rules for Using Public Communication Devices
Tips and Best Practices on Managing Your Inbox