Can I have 3 Company Admins on an account?

I am the Primary Admin on my QBO Company; I have added two additional Company Admins.  However, one of the company admins is not receiving the invite.  I checked the user's email, and the email account is working perfectly.  It appears that the invitation is not being sent yet the system shows the resend invite, indicating it has been sent.  I have also attempted to select the resend invite.