Outlook is displaying multiple password prompts

In the event you run into multiple password prompts in Outlook or an infinite password loop, then please follow these steps to correct the issue.

1. Close all Office applications, including Skype and Teams.

2. Click Start and type cmd, but don't press Enter.

3. Right-click Command Prompt and choose Run as administrator.

4. Paste the following text into the Command Prompt window and then press Enter:

   powershell.exe -Command "& {Invoke-CommandInDesktopPackage -PackageFamilyName (Get-AppxPackage Microsoft.Office.Desktop).PackageFamilyName -AppId (Get-AppxPackage Microsoft.Office.Desktop).PublisherId -Command C:\Windows\regedit.exe}

5. Set the following Registry Key: [HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity] "DisableADALatopWAMOverride"=dword:00000001"

6. Open Windows PowerShell and clear your credentials cache by running the following command:

   cmdkey /list | ForEach-Object{if($_ -like "*Generic:*"){cmdkey /del:($_ -replace " ","" -replace "Target:","")}}

   Note: If you prefer not to run that command you can manually delete all the credentials that start with MicrosoftOffice16_Data:ADAL in Credential Manager > Windows Credentials.

7. Reopen your Office applications. You may see the password prompt one additional time.