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10,115 questions
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Hi @Michael Ball ,
Welcome to our forum!
In order to further confirm the issue, please add another account to check if the issue persists.
If the issue only occurs when you add the Hotmail.com account, does this issue occur when you try to configure your Hotmail.com account as POP/IMAP in Outlook 2024?
If so, as i know, considering that the issue may be related to Modern Authentication, please note:
Please create a new Outlook Desktop profile(Control Panel>Mail>Show Profiles>add) and then add your Outlook.com account using automatic account configuration, which will add the account with Modern Authentication.
Hope to help you!
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