Vault Notification Server (VNS) Autodesk® Vault® allows you receive notifications of any changes within files, folders and change orders on your mobile phone or through appropriate emails. 

The app features: 

• Subscribe to objects in system;
• Sending Notifications with link (to PC or mobile) of changes;
• User's subscriptions management;
• User's notifications management; 
• No Vault license needed if you're not using e-mails.

More information about Vault Mobile here.