I can only open my primary hotmail account. The two others I had direct links to cannot be opened. How do I get into what Outlook calls alias accounts?

I go into my primary, no problem.  Cannot get into my two others which Outlook calls alias's.  They are both shown as alias's, although the word hotmail in the address was changed to outlook.  I don't see how this can be as hotmail and outlook both existed individually before being combined. No matter what I do, following outlook instructions, which are ambiguous at best, it always takes me back to my primary email address.  I've been unable to open accounts I had with hotmail for years.