MS Accounts

OK sorry, this is not music related but I don't know where else to turn. Does anyone have the foggiest idea of how Microsoft accounts works?
Scenario - I use several www.outlook.com mail accounts and I look at these using Microsoft Office Outlook Mail Client
call the accounts account1@outlook.com and account2@outlook.com
Problem - all was well and good until I wanted to change the password on one of the accounts and to do that I have to log in directly to www.outlook.com But it refused my password - why I do not know, I have used the same password for years
So I thought ok, I'll just reset the password - I did that, sent for an access code etc, but I was still told the password is wrong
I did however finally get into the account, or so I thought, because when I went to 'reset password', I noted the account details were for the other outlook.com account, even though I had logged in with the credentials for the other account.
Could anyone give me some idea of what's going on?
Scenario - I use several www.outlook.com mail accounts and I look at these using Microsoft Office Outlook Mail Client
call the accounts account1@outlook.com and account2@outlook.com
Problem - all was well and good until I wanted to change the password on one of the accounts and to do that I have to log in directly to www.outlook.com But it refused my password - why I do not know, I have used the same password for years
So I thought ok, I'll just reset the password - I did that, sent for an access code etc, but I was still told the password is wrong
I did however finally get into the account, or so I thought, because when I went to 'reset password', I noted the account details were for the other outlook.com account, even though I had logged in with the credentials for the other account.
Could anyone give me some idea of what's going on?