I have a similar request that you solved earlier.
We will probably soon start using MailChimp and I would like to keep our customer database in sync with MailChimp dual directions. Our database is designed i MS access 2013 and we manage it in house.
So information about each person in the local databas (frontend/ backend design) should be synchronized to MailChimps database.
Are you available to help us with this?
"We want to keep two customer tables in an Access 2013 database in sync with two mailing lists in Mailchimp.
A single Access form and underlying code needs to be created that keeps each Access table in sync with it's respective Mailchimp list. Two buttons on the form are required, one for each list.
The sync needs to be two-way.
Bidders with related experience are required. Please provide a simple brief of how you would propose to achieve this (including any details of pluggins or 3rd party bits, and costs of these, if any) in your reply. Ambiguous replies will be ignored."