Users who are setup with enterprise accounts and business accounts that sign in with SSO cannot add a secondary email, as we do not have an Asana password. An incorrect password error is generated when you try and submit using SSO password.
Hi @Hunter_Lohmann, thanks for reaching out!
You can get in touch with our Support team who will be able to add a secondary email address for you 
You can contact them by following these steps:
I hope this helps
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