Hi Bosco Das,
To answer your question directly: the Microsoft Store does not support work/school (Entra ID) accounts for purchasing Windows upgrades, including the Home → Pro upgrade. Even if a device has M365 apps installed or is managed by Intune, the Store still requires a personal Microsoft Account (MSA) for buying licenses or upgrades. This is why your Home edition device refuses the work email but accepts personal ones.
For the Intune-managed devices, what you’re seeing is also expected. While Intune allows app deployment using work accounts, the Store itself still won’t authenticate a work email for purchases, only for app entitlement when pushed through Intune or the Company Portal. Anything involving a transaction, OS upgrade, or license purchase is handled exclusively through personal MSAs.
The cleanest route for upgrading Home → Pro is either entering a valid Pro product key under Settings > System > Activation, or purchasing the upgrade using a personal Microsoft account on the device. If you'd like, I can walk you through the correct upgrade path step by step based on your environment.
I hope this helps clarify the situation. If you find this answer useful, please hit “Accept Answer” so I know it resolved your concern 😊.
Jason.