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Unable to re-add Outlook account

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Cashie_
Cashie_

All the folders, Inbox included, disappeared from one of my outlook accounts. It's OK everywhere else so I decided to remove and re-add the account in Thunderbird but now I can't add it again.

I get the error. "Authentication failed. Please check the username and password Exchange auth error"

I know the Username and Password is correct.

Solution appreciated, please.

All the folders, Inbox included, disappeared from one of my outlook accounts. It's OK everywhere else so I decided to remove and re-add the account in Thunderbird but now I can't add it again. I get the error. "Authentication failed. Please check the username and password Exchange auth error" I know the Username and Password is correct. Solution appreciated, please.

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