Hello,
Based on the information provided, since you have an Office 365 plan E3, you already have access to PowerApps. However, if you want to grant access to external collaborators who are not part of your organization, you would need to purchase additional licenses.
For internal organization members, since you have 200 users, you may need to consider whether the included licenses cover all of them. If not, you might need additional licenses.
Regarding premium per app PowerApps licenses, they are required if you want to use premium features such as AI Builder or custom connectors. If your PowerApps application does not rely on these premium features, you may not need to purchase additional licenses.
It's recommended to review the specific features you plan to use in your PowerApps application and consult with your Microsoft representative to determine the most cost-effective licensing option for your organization's needs
hit Thumbs if it helps.
Thanks
