Hello Hannah,
The message “the requested operation requires elevation” is coming from Windows itself, not Microsoft 365. Being a Global Administrator in Microsoft Entra ID (Azure AD) or Microsoft 365 does not automatically make your local Windows account an administrator with elevated rights. Those are two different layers of administration.
On a brand-new Windows installation, you need to ensure that the account you are signing into is part of the local Administrators group. To confirm this, press Win + R, type netplwiz, and check the properties of your user account. Under the “Group Membership” tab, it should show “Administrator.” If it shows “Standard user,” you will not be able to elevate privileges even though you are a Global Admin in Microsoft 365.
If your account is already listed as Administrator but you still see the elevation prompt, it means you are hitting User Account Control (UAC). In that case, you must explicitly run the program as administrator. Right-click the installer or application and select “Run as administrator.” This is by design in Windows security: even administrators run with standard user rights until they elevate.
If you want to avoid constant prompts, you can adjust UAC settings. Go to Control Panel > User Accounts > Change User Account Control settings and move the slider down to “Notify me only when apps try to make changes (do not dim my desktop)” or lower. Be cautious, though-reducing UAC weakens protection against unauthorized changes.
In short, your Microsoft 365 Global Admin role does not grant local elevation. You need to verify your Windows account is in the Administrators group and then use “Run as administrator” when prompted.
I hope you've found something useful here. If it helps you get more insight into the issue, it's appreciated to accept the answer. Should you have more questions, feel free to leave a message. Have a nice day!HP.