Ricky_Su Thanks for reaching out!
You can install Whiteboard using System Center Configuration Manager (SCCM) using a downloaded appx from Store for Business. We highly recommend doing an online license type (https://docs.microsoft.com/en-us/microsoft-store/acquire-apps-microsoft-store-for-business) and then deploying that via SCCM. Once installed, an online licensed appx will automatically sync with the store and keep updating.
If your users aren’t allowed to install from the store but you don’t block access to the store IPs/URLs, then you can use https://docs.microsoft.com/en-us/windows/client-management/mdm/policy-csp-applicationmanagement#applicationmanagement-allowappstoreautoupdate to allow updates without new installs.
If your users are fully blocked from accessing the store, you can download an offline licensed appx and manually deploy new versions each time the app is updated (about once a month).
Hope this helps 🙂
Jasmin, Microsoft