Using Outlook for Android for personal email and calendar management
POP and IMAP access to your account will give you email access only, not Calendars etc. It can be a work-round if that is all you want, but is not a fix for inability to authenticate EAS with password. Hitting X to use Microsoft login directs to Azure applicable only to business and schools not individual users. If that directed instead to Microsoft login then maybe that would help.
Looking at Google Play Reviews of Blackberry Hub+, BB have replied to one unhappy user with the following:
"BlackBerry Limited 26 January 2024, Hello, we regret that you are having issues with Outlook email access. There are many reports in Microsoft and reddit forums of many users having similar issues with diverse email clients authenticating against Microsoft email servers. We currently believe this is a Microsoft service issue, but we are also investigating on our end."
At the moment I am still getting emails and Calendar using my EAS login. That is interspersed with notifications to enter password, the latter fails each time and then invited to look at settings. There has clearly been a MS server side change January 2024 affecting authentication that has impacted individual BB Hub+ users accessing outlook, email and calendars which needs to be fixed.