Invoicera.com is integrated with Google Apps using Single Sign On and a Google universal navigation link. Users sign in once (to Google Apps) and access Invoicera.com from the same links they use to navigate the Google Apps suite.
Installing Invoicera.com will add a link to the Google universal navigation throughout all your Google Apps. The first time a user in your domain clicks the link, he or she will be guided through either creating a new Invoicera.com account or linking to an existing one.
Once a user's Google Apps account is associated with a Invoicera.com account, clicking the link to Invoicera.com from anywhere inside Google Apps will directly open the user's Invoicera.com account without the need to log in with a separate username and password.