See here first - https://support.mozilla.org/en-US/questions/1482892

Checking passwords can be done by accessing the Hamburger icon (top right)/Settings/Search for 'Password'/Saved Passwords/Show Passwords (use your windows log in to access the information).

Thanks for getting back to me so quickly. Unfortunately the stores passwords shown are only for my Gmail accounts and the outlook email doesn't appear for some strange reason. Any other thoughts or suggestions?

Thanks for getting back to me so quickly. Unfortunately the stores passwords shown are only for my Gmail accounts and the outlook email doesn't appear for some strange reason. Any other thoughts or suggestions?

You will need to set up outgoing and incoming servers with correct authentication and server names. You are probably trying to send Outlook email through the gmail servers.

For example, set up a new server in the Outgoing Server settings: Hamburger (top right)/Account Settings/Outgoing Server (SMTP) (left) then link the server by using the settings in the 'Account Settings' for that Email provider.

I am unable to access an outlook.com account on my PC as it keeps coming up as wrong password

What is the exact error message?

What version of Thunderbird?

Please post your Troubleshooting Information. At the top right of the Thunderbird window, click the menu button ≡, then select Help > Troubleshooting Information. Press the "Copy text to clipboard button" and paste the information into your reply.