Turn off the advertising ID for every account — via Microsoft Learn

Group Policy

Open gpedit.msc (Pro, Enterprise and Education only) and go to:

Computer Configuration > Administrative Templates > System > User Profiles > Turn off the advertising ID

Registry equivalent

Double-click a .reg file and confirm to merge it. Right-click → Edit first if you want to read it, which is always a good idea with any .reg file from the internet.

Apply

Windows Registry Editor Version 5.00

; Oddbyte.Me: Turn off the advertising ID for every account

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\AdvertisingInfo]
"DisabledByGroupPolicy"=dword:00000001

Undo

Windows Registry Editor Version 5.00

; Oddbyte.Me: undo Turn off the advertising ID for every account

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\AdvertisingInfo]
"DisabledByGroupPolicy"=-

Same thing from a command prompt

Run in an administrator Command Prompt or Terminal.

reg add "HKLM\Software\Policies\Microsoft\Windows\AdvertisingInfo" /v "DisabledByGroupPolicy" /t REG_DWORD /d 1 /f

Undo:

reg delete "HKLM\Software\Policies\Microsoft\Windows\AdvertisingInfo" /v "DisabledByGroupPolicy" /f

Microsoft lists this policy for Pro, Enterprise and Education. When it is not configured, each user controls the advertising ID in Settings.