Hi, what's is SIte ID in Usage Meter 3.3 isn't documented and reference to this setting in user guide of usage meter 3.3
(optional) Enter the SP-defined ID for the Usage Meter location. Service
Providers can create sites to report multiple locations with multiple usage
meters. This can be used to report back to an individual site for each usage
Please refer to the updated user's guide. vCloud Usage Meter User's Guide 3.3.pdf.