聪聪 0 Reputation points


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A family of Microsoft email and calendar products.
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  1. ChristyZhang-MSFT 22,336 Reputation points Microsoft Vendor

    Hi @聪聪 ,

    Welcome to our forum!

    Please kindly only English is supported in our forum and it's suggested that you could post your case in English so that other users can discuss your case.

    For the error your provided, i have found a known issue about it, which introduces that when a Microsoft 365 user tries to set up Outlook, this issue can occur if the user has an account at a third-party provider that uses the same email address and password that the user's Microsoft 365 account uses. Please refer to this article and try the solution mentioned in it:
    Connection to Microsoft Exchange is unavailable error when a Microsoft 365 user tries to set up Outlook

    Hope to help you!

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