There are a few things that you can do. The first and easiest would be to set up email forwarding from your CIU email to forward all emails to your personal email by going here: https://outlook.office.com/mail/options/mail/forwarding.

Alternatively, if you want to view your emails on your mobile device you could connect your CIU email so you would be able to view all your personal emails and CIU emails in the same window. If you have an iPhone you can follow this link:  https://support.apple.com/en-gb/HT201320, or if you have an Android you can follow this link: https://support.microsoft.com/en-us/office/set-up-email-in-android-email-app-71147974-7aca-491b-978a-ab15e360434c.