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This prevents how to fix Outlook not opening today Windows clients that are running Office from logging in as required by the authentication process. I would have been devastated if I’d had to move away from Thunderbird (which I love) or from Hotmail (which I’ve been using since it was launched nearly 30 years ago). Additionally, accessing email through a web client will continue to work, even if an application is having issues.

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But primarily I am guessing you are changing the server name. This does not enable any oauth list entry that may be available for that server. Then the entry will be in the list for you to select. I have no issues in Outlook 365 with being a global Repair Outlook Profile Online admin and having modern authentication with multi-factor authentication. If you have an issue that’s not listed in this article, go to the following Microsoft TechNet wiki page.

If you use AD FS in Windows Server 2012 R2

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