Update a Client's Email When using the MailChimp Integration?

How to update a client's email when using the MailChimp integration. 

• Navigate to the Client's case. 
• Go into the Client Tab. 

• Click the Contact Details header. 
• A pop-up window will appear.
• Update the email 1 section with the new email address.

• Click Save.
• Click the dropdown menu next to the case status at the top right. 
• Select Manage Mailchimp Lists.

• Update any necessary selections. 
• Click Save. 

• The client's new email address will now be subscribed to those MailChimp Lists.