An NSX administrator would like to export syslog events that capture messages related to NSX...

According to the VMware NSX Documentation2, the FABRIC message ID (msgld) captures messages related to NSX host preparation events, such as installation, upgrade, or uninstallation of NSX components on ESXi hosts. The syslog export configuration command for NSX host preparation events would look something like this:

set service syslog export FABRIC

The other options are either incorrect or not relevant for NSX host preparation events. MONITORING captures messages related to NSX monitoring features, such as alarms and system events2. SYSTEM captures messages related to NSX system events, such as login, logout, or configuration changes2. GROUPING captures messages related to NSX grouping objects, such as security groups, security tags, or IP sets2.

https://docs.vmware.com/en/VMware-NSX/4.1/administration/GUID-CC18C0E3-D076-41AA-8B8C-133650FDC2E7.html