The following 'purge-published-sessions' commands from the API reference guide do not work on the MDS:
'# mgmt_cli purge-published-sessions number-of-sessions-to-preserve "10" --version 1.5 --format json'
and
# mgmt_cli purge-published-sessions preserve-to-date "2018-07-29T12:00:00" --version 1.5 --format json'
Cause
There is a missing reference to a specific domain which should be added for MDS usage.