Microsoft Account and Email in a mess - how to FIX

I set up my wife's Microsoft Account using Office 365. On her laptop running Windows 11 26H2 but she also uses her Samsung android phone. Her account is say ******@outlook.com she logons to that on PC. However her Email is on VM say ******@blueyonder.co.uk. She uses Outlook 365 on the laptop for this email. A nightmare to set up as MS assumes your mail will be MS Google Yahoo etc.. So I have to force it via Advanced and all the PORTS etc.. On the Android phone is just such a nightmare - thanks MS/Google you not the only ones! But her office 365 account has her EMAIL as first.name7@outlookcom (I must have some how messed up when setting up). Also the alternative Email for sending recover is on AOL we don't have an EOL she would use her blue yonder. So WE want:
Account: ******@outlook.com

Email: ******@outlook.com

Alt email: ******@blueyonder.co.uk.

On the laptop she uses HALO PIN ok

How can we remove the wrong Email and correct ALT Email. I have gone on her account page on the account.microsoft.com but can find how to remove the wrong MS Email and the wrong ALT Email. I have an MS account and think I may be the master account on our MS office 365 subscription.