If you ever feel the need to change the service user account of the vRealize automation user (the account that has a dedicated user/role at the vCenter configured), make sure to do the following afterwards.
It’s not sufficient to change the credentials of the vCenter user in the endpoint section of vRA.
Remember that our vRealize Orchestrator and the IaaS componets needs to connect to the vCenter as well. If you miss the following steps your next requests will fail: