Your legacy DoubleClick password has expired. You still need to have an active legacy DoubleClick password to access Boomerang even after you update your DART for Publishers (DFP) sign-in to a Google Account.
Perform the following to update your legacy DFP password and regain access to Boomerang:
- Sign in to DFP with your Google Account username and password.
- Go to My Profile.
- Go to Change DoubleClick Password and change your password.