All versions of the Centrify DirectControl SSO Module for SAP on all platforms
Are there specific SAP GUI version requirements to ensure SSO will function properly?
There are no specific SAP GUI version requirements and all versions should work.
Although no specific SAP GUI version is required, you do need to install the appropriate dll's and set up SNC on the client.
For more details, upload the attached centrify-server-suite-2016-docs.zip', file and select "centrify-dc-sap-authentication-guide.pdf'" , review page 26-27.