Hi Susan,

With these new ways to stop Outlook New from installing-Blocking.

I would presume we could delete the old reg keys we added from
this post below?

https://www.askwoody.com/forums/topic/new-outlook-whether-you-like-it-or-not/#post-2718811

And other methods that Peter Deegan mentioned in the past newsletter
“Stopping the migration to Outlook (new)”

I would be interested to know what you think.

Thank you…

Is this for both Win 10 Pro and Win 11? I don’t use Outlook, and it is not showing in ‘apps & features’ in my local Admin/User accounts, so unsure if on my system. Should I still use this ‘block’ method?

*I have not installed Jan updates yet

I don’t see any Registry Key beyond Orchestrator. I ran the batch file, it appeared to add the key, at least a window opened briefly. But I don’t see anywhere, the information in your suggested key beyond Orchestrator. So what am I missing? I do NOT use Outlook as it is, did at work but retired six years and no need for it, don’t like it and never use it on my desktop PC, anytime it pops up, I just grab the TO: address and use my private email for whatever it is I’m doing.

I mention this because I’ve run other batch files that should prevent Windows from doing things as you’ve suggested in the past, but they didn’t prevent anything. I’m not supposed to be offered Windows 11, yet I regularly am. I’ve Win10 Pro and will use it till it dies, which will be when this HP Pavilion is six years old, I figure I’ll replace this PC then, this fall. Which will force me into Win 11, which I don’t want but can’t avoid. I do use Apple products iPhone 16 Pro Max, new iPad Pro with the newest Magic Keyboard (which is amazing), did have a MacBook Pro at one time but after retirement had little use for it so sold it back to Apple when upgrading an iPhone.

I’m interested in the series on Mac Mini running now, I sort of got used to Mac Os when I had the MacBook Pro, but never got really comfortable – have been using PC’s since the DOS day, and moved into Windows when it arrived and have been there ever since. So I’m in a quandary here about what to do this fall, at 75 I’m still moving along fine, but not interested in much more than a functional Desktop PC which I am familiar with and use mostly for entertainment purposes, email, shopping, research, etc.

So, I guess my main question is why don’t I have in my Registry that key? Maybe a second one regarding why previous Registry entries didn’t actually do what they were purported to? Thanks. :^) gene

I run Windows 10 Home, and a single license for Office 2016 C2R.  Does this apply to me? I haven’t seen anything offering me Outlook (New) yet or tried blocking it, but I did look at the registry.  I do not have a UScheduler_Oobe key under Orchestrator, just CoreMigration, Installation and USOShared.

Paul T wrote:

Susan Bradley wrote:

it has to be added

By downloading and double clicking the REG file in the top post.

cheers, Paul

Would manually adding the key and string value in the registry editor accomplish the same thing?

I just noticed that I’m too late. Outlook (new) is listed under Apps & Features on my Windows 10 Pro laptop, dated 1/15/25. I have no idea how I got it. I last did a Windows Update on 1/12/25 (i.e., pre-January update) and I’ve had it on pause since then.

Now what do I do? Is it enough to just uninstall it and then add the registry key to prevent it from being reinstalled?

Susan Bradley wrote:

Ways and methods to block New Outlook from installing on your computer

Susan, you provide two (2) methods to add the Registry Key into the Registry, a .reg file and a .bat file.
Which one is the best one to use?
Pls advise “specifically” how to go about using each as it has been many years since I utilized either type of file.

Also any reports that utilizing this registry edition causes problems with the remaining Update from properly installing?

Thanks

I was able to uninstall all three, then ran the batch file. Where in the registry will I find the “block” of any further installation attempts, the batch file runs so fast I couldn’t see where the entry it made, was made. :^)

Maybe a dumb question, but I’m curious whether this reg entry would block a local (C2R) version of MS Outlook if you had to reinstall it?

I feel like a dummy for asking this, but here goes. Right now on my Win10 Pro, having installed January updates, I have neither old Outlook nor new Outlook installed. I do not want anything installed I will not use, specifically Outlook (old or new). Will MS try to install new Outlook regardless meaning I need to block it? Do I need to really do anything to avoid getting Outlook added new by MS?

Is this a “new Outlook will be installed for everybody” regardless of whether you have old Outlook or not?

I had hoped by this point in time that Win10 would be stable and just getting true security updates and not adding new apps to my system.

Apologies for my dumb question. (Just want MS to leave my system alone…)

Tex265 wrote:

please advise where to find the instructions for utilizing each of the downloads.

For the .reg file:

• Download the .reg file
• Right click the downloaded file and select Merge
• You will have to Yes the UAC window
• You have to acknowledge the warning boxes about changing the Registry and OK it to proceed and add the registry value.
• A window should open and tell you that it was added.

For the .bat

• Download the .bat file
• Right click the downloaded .bat file and select Runs as administrator
• Answer Yes to the UAC window.
• It will run and add the registry value, but there is no window telling you that it did add the key.
• The .bat file runs with less warning or get permission windows.

I ran the .bat file which didn’t add the registry keys.
Ran the .reg file which did add the registry keys.

Alex5723 wrote:

Ran the .reg file which did add the registry keys.

This is because the BAT file needs to be run with admin privileges.
Use the REG file to avoid that issue.

cheers, Paul

Paul T wrote:

This is because the BAT file needs to be run with admin privileges

I have admin rights and ran as admin.

Deo wrote:

I could be very wrong, but perhaps  your instructions are reversed? I used the ‘registry key’, and didn’t have to ‘merge’…my experience with reg key file (1st link in Susan’s post) was similar to the instructions you posted under ‘For the .bat’, and via Susan’s video? I’ve never used a .bat before

The instructions are correct.  The default “open” action for a .reg file is Merge, so you can just click to open the .reg and it will start the Merge.  Right click the .reg file and you will see the Merge in bold type because that is the default action when clicked to open.  Telling users to right click and select Merge goes back to years ago when users had the default “open” action for a .reg as Edit which will open the file to edit what is in the file but not run it.  So right click and Merge will run the file and add the registry key no matter what default “open” action a user has for their .reg files.

A .bat file is a file that contains command(s) that can be used in a Command Console (Command prompt window).  Running the .bat file is the default action for “open” the file.  Running the file means it will run the command(s) in the Command Console (most of the time without the Command window opening).  Some commands require Administrative approval to run and the commands that add registry values do require Administrative approval.  To give the command in the .bat file Administrative approval it needs to run, you right click the .bat and select Run as administrator which opens the UAC window for you to give Administrative approval to run.

A little more explanation about this Run as administrator.  Most users have the only account  on their PC and know that they have an “Administrator” account.  WRONG, they have an account with “Administrative Privileges”.  That means they can do anything that requires Administrative level authority by using their “Administrative privileges” to authorize any function requiring Administrative level authority, but each action requires their approval.  This is why you have to select Run as administrator and give that authority to run the .bat file.  Clicking the .bat and not selecting the Run as administrator does not give your Administrative privileges to the action and the command will run but will not perform the action the command was to do because that requires Administrative approval.

BTW: Most user are unaware that there is a true Administrator account on their PC that they never setup or use.  That Administrator account runs everything as Administrator and does not have to approve any Administrative action.  Thus, this true Administrator account can run the .bat file by just clicking it and no UAC window will open.  No UAC with the .reg file either.

Susan Bradley wrote:

If it installs use the following command in PowerShell to remove it

Remove-AppxProvisionedPackage -AllUsers -Online -PackageName (Get-AppxPackage Microsoft.OutlookForWindows).PackageFullName
Blocking new Outlook can also be done with Group policy. You will need to download the new Group Policy ADMX file and edit the settings in the following section:

File Name: outlk16.admx
Policy Setting Name: Disable web add-in installation on migration to new Outlook for Windows
Scope: User
Policy Path: Microsoft Outlook 2016\Miscellaneous
Category: Miscellaneous
Registry Information: HKCU\software\policies\microsoft\office\16.0\outlook\addins!disablecomtowe

Can New Outlook be uninstalled by clicking Settings>Apps & features>Outlook (new)>Uninstall?

hello world

anyone seen the combo of having the ‘outlook new’ inside the
start menu but not installed/provisioned at the user/machine level?
this is very annoying as the powershell Remove-AppxProvisionedPackage
wont work.

how to automate the startmenu right-click remove?

I installed the linked ADMX files. The group policy setting you show is under User Configuration > Administrative Templates > Microsoft Outlook 2016 > Miscellanous > Disable web add-in installation on migration to new Outlook for Windows. The description says in part, “This policy setting allows you to disable installation of web add-in equivalents of COM add-ins on the switch to new Outlook… COM add-ins do not work in new Outlook for Windows. By default, users in the organization will get the option to install available web add-ins, in place of COM add-ins, when they move from classic Outlook for Windows.” So, this setting is about add-in migration, not about blocking New Outlook.

There is a group policy to hide the new Outlook toggle switch (HideNewOutlookToggle):

User Configuration > Administrative Templates > Microsoft Outlook 2016 > Outlook Options > Other, Hide the ‘Try the new Outlook’ toggle in Outlook

I am not seeing a way in group policy to implement the equivalent of the BlockedOobeUpdaters registry key.

I see that I have New Outlook installed on most machines now. I’m going to block the toggle so users don’t accidentally migrate. I did load it on one of my machines. I could probably adjust to the UI, but am worried about limitations on PST files, which are an important migration/management tool.

Susan Bradley wrote:

Ways and methods to block New Outlook from installing on your computer You can watch a video here before you begin. (link will launch to Youtube)

One minor observation about your video.

The instructions <here> at 5:18 of your companion YouTube video successfully added the required registry value in my Windows registry when I used my MS Edge browser. However, those instructions didn’t work with my default Firefox browser because Firefox does not have a “Run” or “Open” option when downloading files and can only “Save” for security reasons.

Based on other comments in this topic, I assume that users who download your BlocknewOutlook-1.reg file with Firefox could save that .REG file to their desktop and then double-click (or right-click and choose “Merge” from the pop-up context menu) to add the required registry value.
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