Imap email issue

Hi, newbie here so still getting to grips with bb10 and my new passport se. Please go easy, and yes I have tried googling the issue.
Just synced my BlackBerry with works email server, it's an Imap account, emails are coming through on the device but getting no notifications, phone is set up correctly to receive them. However, if I close down the outlook account on both pcs at work it starts notifying me on my blackberry.
Can anyone shed any light on the issue please?

Posted with BlackBerry Passport silver edition