Once the new profile key is generated, the credit card profile in NetSuite needs to be updated. These are the steps:
1. Using Administrator role, navigate to Setup > Accounting > Credit Card Processing.
2. Hit the Edit beside Merchant e-Solutions profile.
3. Under Authentication Credentials section > Profile Key field, type in the key provided by Merchant e-Solutions.
4. Hit Save.
Note: It is highly recommended to log out from NetSuite and clear the browsers cache before logging in and processing credit card transactions.