To enable API access for KiSSFLOW within Google Apps, you can follow Google’s support documentation, or follow these instructions.
The Google Apps Admin needs to perform the following actions:
Navigate to http://admin.google.com
Open the security page
Navigate to API reference
Check the Box which says "Enable API access"
Grant Access to KiSSFLOW
Open the Marketplace Apps Page
Open the KiSSFLOW App
Ensure that Data access is granted