I wanted to disable the prompt and button for new Outlook. I found this guide and wrote a few lines of PowerShell to automate it and wanted to share.

# Source https://edi.wang/post/2025/1/20/how-to-stop-automatically-switching-to-new-outlook
$path='HKCU:\Software\Microsoft\Office\16.0\Outlook'

# Remove and create to ensure correct data type
Remove-ItemProperty -Path "$path\Options\General" -Name 'NewOutlookAutoMigrationStage' -ErrorAction SilentlyContinue
New-ItemProperty -Path "$path\Options\General" -Name 'NewOutlookAutoMigrationStage' -Type DWord -Value 1
Remove-ItemProperty -Path "$path\Options\General" -Name 'NewOutlookAutoMigrationStage'
Remove-ItemProperty -Path "$path\Options\General" -Name 'NewOutlookAutoMigrationType'
Remove-Item -Path "$path\NewOutlook"
# Remove and create to ensure correct data type
Remove-ItemProperty -Path "$path\Preferences" -Name 'UseNewOutlook' -ErrorAction SilentlyContinue
New-ItemProperty -Path "$path\Preferences" -Name 'UseNewOutlook' -Type DWord -Value 0
Remove-ItemProperty -Path "$path\Preferences" -Name 'NewOutlookRenudgeStartDate'
Remove-ItemProperty -Path "$path\Preferences" -Name 'NewOutlookRenudgeStartDate'
  • flambonkscious@sh.itjust.worksEnglish
    0·
    3 months ago

    Nice. So this is all user-based though?

    You could do a machine deployment with something like PSADT but it’s probably overcooking it (I don’t really understand when/how it switches from old to new)

    • captcha_incorrect@lemmy.worldOPEnglish
      0·
      3 months ago

      So this is all user-based though?

      I would assume so since it is HKEY_CURRENT_USER. I took a glance at HKEY_LOCAL_MACHINE and the same keys were not there. Perhaps this would had to be run for each user at first login.

      I am the only user of my work computer and it is not even managed, so PSADT would indeed be overkill. :-)