Microsoft just released a beta of this: https://products.office.com/en-us/microsoft-whiteboard/digital-whiteboard-app https://products.office.com/en-us/microsof

Microsoft just released a beta of this: https://products.office.com/en-us/microsoft-whiteboard/digital-whiteboard-app https://products.office.com/en-us/microsoft-whiteboard/digit... It seems reasonably functional. I'm surprised it took so long for something like it to appear though.