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Office 365 — Problems Signing Into Office, Outlook, Teams

On Windows 10, if experiencing the following problems:

  • When attempting to sign into Microsoft Office, Outlook or Teams, the sign-in process may seem to complete successfully but nothing happens.

  • Outlook continually prompts for credentials for an Office 365 mailbox but doesn't connect.

  • If adding an Office 365 mailbox to Outlook, it eventually says “An encrypted connection to your mail server is not available. Click Next to attempt using an unencrypted connection.

  • In SettingsAccountsAccess Work or SchoolConnect, the sign-in dialog flashes quickly but disappears.

This may occur if the Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy Universal app has corrupt information.

To remedy, open PowerShell and enter:

    Get-AppxPackage -Name "Microsoft.AAD.BrokerPlugin*" | ForEach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppxManifest.xml"}
    Get-AppxPackage -Name "Microsoft.Windows.CloudExperienceHost*" | ForEach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppxManifest.xml"}

or on Windows 11:

    Get-AppxPackage -Name "Microsoft.AAD.BrokerPlugin*" | Reset-AppxPackage
    Get-AppxPackage -Name "Microsoft.Windows.CloudExperienceHost*" | Reset-AppxPackage

If that doesn't fix the issue, open a command prompt and enter:

    for %x in (AAD.BrokerPlugin_cw5n1h2txyewy Windows.CloudExperienceHost_cw5n1h2txyewy 549981C3F5F10_8wekyb3d8bbwe) do ren "%LocalAppData%\Packages\Microsoft.%x" Microsoft.%x.%Random%

Then reboot.

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