The server account of all SCOM servers should register the following SPNs:
- MSOMHSvc/NetBIOSName
- MSOMHSvc/FQDN
The Data Access Account should register the following SPNs:
- MSOMSdkSvc/NetBIOSName
- MSOMSdkSvc/FQDN
If you have multiple SCOM Management servers you will need the above on the Data Access Account for EACH of them.