title: Microsoft 365 subscription extra-costs for registering app in Azure Active Directory Admin Center
body: <p>I am a software developer and I've been working on integrating Microsoft Graph Api in my application to be able to retrieve calendar information for users. For development purposes, I have been using a Microsoft 365 Developer subscription, in which I register my app, by following <a href="https://docs.microsoft.com/en-us/azure/active-directory/develop/quickstart-register-app" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/azure/active-directory/develop/quickstart-register-app</a>. This seems to be working fine with my developer subscription, so after creating a small proof of concept, now I am trying to make a time and cost estimation for this, and I have some doubts about if there are any costs for the client.
  Is Azure Active Directory Admin Center available on all Microsoft 365 business plans with the &quot;App registration&quot; option? Or are there any other cost-related aspects I need to take in consideration?
  I've searched online and found that there shouldn't be any additional costs, but since I am not really familiar with Microsoft 365 and Azure Active Directory Admin Center other than what I used for my proof of concept, I am not really sure I have the right information.
  Maybe there is someone who already implemented this in production and can have a better understanding over this.</p>
  <p>Thanks</p>