I run Outlook 2016 for Mac as my daily email client and receive a huge number of emails on daily basis. Due to this my mailbox fills up fast and I export all the emails I order to have a backup and I can retrieve any email later when I want to. However this time the export function stopped working. The export will start but not exceed 1%. I don't know what the issue is. Can anyone help me or provide me with some other solution to backup emails from Outlook 2016 for Mac?