Microsoft Account ('personal/common' email)
The Drawboard PDF license is linked with your Microsoft Account, there is no password/login feature for this app for most everyday users. This includes emails that end with @gmail @hotmail, etc.
Signing into this type of account within your Microsoft Store app will allow you to subscribe to PRO.
We recommend this route should you not want to set up an enterprise account with us.
Microsoft Account for Business (company domain email)
These are emails that have custom email domains (eg. @companyname.com @edu.schoolname.com)
For emails like these, you will still be able to download apps from the Microsoft Store app, but not be able to pay for subscriptions. You'd either need your IT admin to make it available from the Microsoft Store for Business or create an enterprise account with us.
This limitation prevents you from subscribing to things like Drawboard PDF PRO as well as some difficultly using/purchasing gifts codes for yourself or others.