Significance of heat-admin in the nodes

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Issue

How to disable heat-admin user, as Active directory users are being used for authentication.
Disable heat-admin user on all the compute nodes.
What is the impact of disabling heat-admin user in the OpenStack environment?

Environment

Red Hat OpenStack Platform 8
Red Hat OpenStack Platform 9
Red Hat OpenStack Platform 10.0
Red Hat OpenStack Platform 11.0

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