http://blogs.msdn.com/b/avkashchauhan/archive/2011/06/21/total-number-of-endpoints-input-and-internal-in-windows-azure-role.aspxIn Windows Azure your service communicate form its endpoints and the endpoints are two type: Input (External) Internal Your role must have at least one endpoint in it. You can not have role without any endpoint. Service Specific Limiten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/avkashchauhan/archive/2011/06/21/total-number-of-endpoints-input-and-internal-in-windows-azure-role.aspx#10224090Wed, 12 Oct 2011 17:45:45 GMT91d46819-8472-40ad-a661-2c78acb4018c:10224090Technology Geek From Delhi<p>Following blog adds more information about above details-</p> <p><a rel="nofollow" target="_new" href="http://blogs.msdn.com/b/avkashchauhan/archive/2011/09/17/whats-new-in-windows-azure-sdk-1-5-use-of-csrun-skip-limit-validation-environment-variable.aspx">blogs.msdn.com/.../whats-new-in-windows-azure-sdk-1-5-use-of-csrun-skip-limit-validation-environment-variable.aspx</a></p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10224090" width="1" height="1">