February 20

Long story short, Microsoft is going to make it possible that your deleted e-mails never disappear and can always be recoverable. That being said, all you need to remember is that Work E-Mail is for Work!

Microsoft will very soon be changing their policy on deleted e-mail messages. Currently, e-mail messages deleted by users are recoverable for a period of about 30 days, not including the extra time allowed by “recoverable items” and certain extended hold configurations.

Thank you Redmond Magazine

http://redmondmag.com/articles/2015/02/20/microsoft-changing-email-retention.aspx