Currently I do not see a way to synchronize the underlying groups in SOI into the CMDB. Groups in SOI are used to create Threshold policies which determine what impact an alert may have on the service. If no groups are used the service and underlying CI's will synchronize to CMDB. However, if there is a group, only the service name will get created in CMDB. None of the CI's will synchronize. I am guessing that CMDB does not know about groups. I would guess this would have to do with the SOI/CMDB connector. I use a lot of groups in SOI and it is prohibiting me from synchronizing services in both products.