Add-on:

Connector for Google Drive & Confluence

Question:

Google Accounts throws Unverified App Warning when connecting to Google Application

Answer:

Google has recently implemented a new security feature to protect user's data. If you've created a new Application on Google Developer Console, you might see the following warning message:

This security feature will now require developers to send in a Verification Form to Google to verify the Application. That said, as long your users click on the "Go to Application" at the bottom of the warning message, the warning message will not appear again, as your user has already approved the access of the Application to his/her account.