other programs using outlook to send

Occasional Visitor

So, I have had my Outlook email linked to several other software programs (tax software, Quickbooks) to send out communications from those programs.   Recently, I had to change my password for Microsoft Exchange Office 365.    When I go into those other programs and change the password to match, they refuse to send and say the password is wrong.   I have copied and pasted, been EXACT with my input of the new password into those other programs and they insist the password is wrong.  I have logged out of Outlook and back in, to make sure that I have the correct password and it works there, but not in the other programs.  Help?

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