See below links for how to add the account or get in touch and we can do a remote session.
PC Outlook
https://www.adam-it.co.uk/support/how-to-add-365-email-to-outlook/
iPhone
https://www.adam-it.co.uk/support/how-to-add-365-email-to-iphone-or-ipad/
Android
https://www.adam-it.co.uk/support/how-to-add-365-email-to-android-phone/