"Invalid email address"
You may see Invalid email address error in GSS/CSE control panel while adding a user on the Admin Accounts tab. To address this error, try these steps:
- A valid Google account is required to add admin account. Create a Google Account by following the instructions provided in Google Accounts Help Center
- Ensure your Google Account is not from old Google apps infrastructure. Review Google Apps Help Center to migrate your Google Account from old infrastructure to new infrastructure for Google Apps