Install Microsoft To-Do without accessing the Windows Store

If you are on windows 11 you should have winget (microsoft package manager).
To install Microsoft to do, open PowerShell as admin and run this command: winget install 9NBLGGH5R558

note: if you don't have admin credentials, the command should run even of you run Powershell as a regular user.

9NBLGGH5R558 is the ID for the To Do app: https://apps.microsoft.com/store/detail/microsoft-to-do-lists-tasks-reminders/9NBLGGH5R558
note it at the end of the URL, if the ID changes, replace that with the current ID. You can figure that out by going to the Microsoft store on the web and search for the Microsoft to Do.

if you don't have winget, run this script in Powershell as admin:
$ProgressPreference='Silent'
Invoke-WebRequest -Uri https://github.com/microsoft/winget-cli/releases/download/v1.3.2691/Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle -OutFile .\MicrosoftDesktopAppInstaller_8wekyb3d8bbwe.msixbundle
Invoke-WebRequest -Uri https://aka.ms/Microsoft.VCLibs.x64.14.00.Desktop.appx -OutFile Microsoft.VCLibs.x64.14.00.Desktop.appx
Add-AppxPackage Microsoft.VCLibs.x64.14.00.Desktop.appx
Add-AppxPackage Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle

the script might change so please check for updates here: https://learn.microsoft.com/en-us/windows/package-manager/winget/

hope this helps.