Issues or errors on the Microsoft Q&A website.
You rejected the AI answer in your thread which got then automatically deleted by the system.
Your thread is still there: https://learn.microsoft.com/en-us/answers/questions/5982319/new-outlook-cannot-add-account
I suggest you reply to your above mentioned thread which in the meantime received an answer by moderator Hendrix-V.
See also: https://learn.microsoft.com/en-us/answers/support/ai-first-overview