Hi Asif,
Thank you for your question. This can be achieved by repointing your log sources to your other two data gateways.
If you would like to continue with 3 data gateways after the migration I might suggest creating a new data gateway and repointing your log sources to it. In this way you will only have to repoint log sources once.
Process would be:
Provision new data gateway
Repoint log sources from old data gateway
Contact support to detach old data gateway from deployment
decommission old data gateway
Please let me know if you have any additional questions.
Thank you,
Patrick Drost
QRadar on Cloud
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Pat Drost
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