The Problem: Having setup the API key, the the field mapping, the Campaign, and the Campaign MailChimp Integration the sync was not happening. I checked the process logs and got the following error output "You have not been allocated an edition from the license...".

The Solution: Although the MailChimp processes have already been setup they need to be set to run as a particular user with admin rights.

1. Ensure you are logged in as admin
2. Click Start > Config > Processes.
3. Select the first MailChimp process '_Sync mailchimp campaigns'
4. In 'Access Settings' set 'Run as' to be the Administrator user.
5. Click 'Save & Close'.

Repeat the process for the '_Sync to the mailchimp list' process.

All done.