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You'll need the following information: If you're using an Exchange account that requires advanced settings, you'll need to remove the account and add it again using advanced settings.To add the account using advanced settings, see Add an account using advanced setup.The most common cause of an out-of-date account is an incorrect password.
If two-factor authentication is turned on for your account, you'll need to create an app password for that account.
An app password is used instead of your normal account password for apps that don't support two-factor authentication.
Check with your email provider for instructions about how to create an app password for your email account.
If you haven't installed alternative security software, you should temporarily turn off Windows Defender Security Center.
Third-party firewalls or antivirus software might prevent you from syncing your email and calendar events.