Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello,
To register your laptop with your Microsoft account, you need to sign in to that laptop using your Microsoft account, receive the security code, and enter it to complete identity verification.
If it does not work, try switching to a local account once, then switch back to your Microsoft account and complete the verification again.
In some cases, the device appears immediately under your Microsoft account, while in other cases it may take one to two days before it is reflected.
However, there has been a long‑standing issue where some devices do not register correctly even after completing all steps.
Please wait a few days, and if the device still does not appear, submit feedback using the option in the lower-right corner.