Yes, MS SQL 2017 is now supported for the Root Server’s Database as of 9.5.13 (release notes for reference: https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/90553c0b-42eb-4df0-9556-d3c2e0ac4c52/page/IBM%20BigFix%209.5.13%20Release%20Notes)