AUT-01 is for offline access.  During tax season we need online access to find missing/lost T4's, get clients NOA etc.  I also contacted CRA so we can resolve this before tax season as we have about 50 clients from last year and we will have more this year with this issue.  CRA agent said it is not a CRA issue, program we are using is probable not making it eligible to efile.  We are able to Efile return but not Represent A Client which is frustrating.