I had to change the password on my outlook account. Then changed the password in Thunderbird using this link reference: [[https://support.mozilla.org/en-US/products/thunderbird/privacy-and-security-settings]] The exception to what i did was : Preference, Privacy/Security; Passwords; Saved Passwords; right clicked as instructed entering updated password which is saved. However, I continue to have difficulty with Thunderbird telling me to "Enter your password ....." Then I enter it and click the box for "Use password manager" So I enter the password that I used in "Saved Passwords," however I get a pop up saying: "Login to server smtp.office365.com with user name [email protected] failed" I am not very good with all this and struggling. I greatly appreciate your assistance!