vRA and Infoblox integratioin

HI

Has anyone implemented vRA 7.2 with Infoblox 7.3.4?

I am seeing an strange issue where IPAM IPs get allocated and released successfully but 'Update IPAM Records' workflow failing.

Infoblox setup created External workflow stub custom property to call "Update IPAM Records" workflow at the end but it doesn't seem to work.

VMware is suggesting to use event broker service instead.

Anyone has used either one method?

Thanks

Srini