SCMB Offline when adding OneView 6.6 to Global Dashboard 2.81

[Ian_C]

I'm trying to use Global dashboard to Connect 2 OneView applanes, one running 6.6 as that will be needed for the old blade chassis. and a new verison 8.

When i add the 6.6 to global dasboard i get - SCMB Offline
I've googled it, and find a post - https://support.hpe.com/hpesc/public/docDisplay?docId=sd00002027en_us&docLocale=en_US&page=t_appliance_add_SCMB.html
which suggested either port 5671 is blocked, which i know is not the case, as these 2 servers are in the same subnet, the other is to REST to regenerate the RabbitMQ certificate, but i'm failing to figure out how to use the rest API?
Any advice on how i do this?DELETE /rest/certificates/ca/rabbitmq_readonly

[shiva_jr]

Hi, lan_C,
            If you are new to use the RestAPI then, you can refer the for postman, one of the RestAPI tool. (link1 and link2)
            This HPE document will help you to execute the command. I believe it works for you.
Regards,
Shiva_JR
Please mark as 'Accepted solution' and thumbs up with 'Kudos' if my post worked