If you want to enable PhishArm for all of your employees, you will be required to whitelist the PhishArm application in your Gsuite admin. Follow the instructions below to whitelist PhishArm application
Sign in to your Google Admin console.
Sign in using an administrator account, Do not use your personal account.From the Admin console Home page, go to Security and Access and data control and then API controls.
3. Under App access control, select MANAGE THIRD-PARTY APP ACCESS.
4. Click on the Configure new app and click on Oauth App Name or Client ID.
5. Search App using client ID (711269600075-8giic07oa6n54go7rneue7baihlcsgba.apps.googleusercontent.com) and follow these steps
Search using the Client ID and select PhishArm
Check Client ID and click Select
Click on Trusted Checkbox and click on Configure.
6. Once you will be done with this configuration, please use this tutorial to install the extension using GSuite Admin.