Domain pushing is now disabled by default on all resellers. You will need to reach out to Support to enable pushing through your account to another reseller account.
The rationale behind limiting access to this feature to avoid situations where a registrant has shared contact details with their original reseller, and without that registrant being aware of it their details end up with a new reseller who they have no contract with, and never agreed to having their data.
Please submit a Verified Support Request to our Support Team so we can update your reseller account for the push. If you are pushing to another reseller (not part of your company, or not a sub account in Enom) please have the gaining reseller also submit a Verified Support Request from their account to allow the push.