emails don't delete on Outlook

[jdoliver]

When offline (e.g. on cross Atlantic flight), I often go through emails on my Note 10.1 and delete unwanted. When I get home to Microsoft Outlook on my PC, those emails are not deleted. However, when I delete from my PC, they DO delete on my 10.1. So the two are synched, but how do I get the emails I deleted on my 10.1 when offline to delete on my PC?