Outlook Web Access is the online version of your school mailbox. You can access it via any modern web browser.
You can use links provided by the school which will allow you to use a simple school username (i.e. asmith)
School Homepage (Under Banner Bar)
Internal Network Launch Pad
All school PC have the Launch Pad set as the homepage, this includes a link to webmail:
Office 365 Portal
You can also login via the Microsoft Office 365 portal. You will need to user your full email address as a username (i.e. firstname.lastname@example.org)