The login/logout events generated by Site24x7 cannot be stopped from our end.
However, the number of events generated by each monitor for its polling can be reduced by enabling a feature called VMware Master Data collection. Please use the following steps to enable it in On-Premise Poller.
1) Upgrade your On-Premise Poller to the latest version.
2) Navigate to <installed directory>/conf and set VMWARE_MASTER_DATA_COLLECTION_ENABLED to true in vmware_monitoring.conf
3) Restart the On-Premise Poller.
Enabling this feature will trigger a master data collector, which takes care of polling various metrics in one shot. By this, each monitor creating a login/logout event will be avoided.
If you need any assistance, please contact firstname.lastname@example.org