Is your system digital signed note enabled?
Is your system TCI note enabled?
Details of the Support backbone steps calculator:
This tool can be used to find the steps for below mandatory changes by SAP :
Enable the SNOTE for TCI SAP notes.
Enable the SNOTE for the digitally signed SAP notes.
Switch from ABAP RFC connectivity to HTTPS connectivity with SAP support backbone
The steps for the above changes are different for the below set of SAP releases
SAP_BASIS release 700 to 731
SAP_BASIS release 740 and above
The tool will calculate the steps based on your SAP system release and the support pack, We always recommend to go through the latest version of the SAP notes mentioned in the referred blogs and any new high priority SAP notes released by SAP recently related to these changes.