title: Azure AD : Single or Multitenant for SaaS-web application
body: <p>We are in the planning phase of creating a web application for employee time tracking systems. If the application is successful, we hope to sell it to other companies as a <em>SaaS</em> (software as a service) service, so that it does not need to be installed on enterprise servers.</p>
  
  <p>I wonder if we should register our application on Azure, as Multitenant or Single tenant? Only employees of a company should be able to use the time reporting system, so I consider using single tenant. But how does it work if other companies want to buy the service and connect their employees? Do we need to create a new web application that is single tenant and unique to the new company?
  Or should we register the application as multitenant so that other companies can connect to our Azure AD?</p>
  
  <p>I'm relatively new to Azure AD, and could use some advice from someone with more experience with Azure and cloud services.</p>