Insurance Agents are at the heart of the Insure Oklahoma Employer Sponsored Insurance (ESI) program. If you are an agent trying to sign one of your employer groups up with the Insure Oklahoma program, you should find all the tools you need in this section. Invoices must be dated from 1^st of calendar month to last of calendar month. If you have any questions or need anything that is not here, please call our helpline at 1-888-365-3742.