You can't decommission the primary Admin Node.

You can't decommission an Admin Node if one of its network interfaces is part of a high availability (HA) group. You must first remove the network interfaces from the HA group. See the instructions for managing HA groups.

As required, you can safely change ILM policies while decommissioning an Admin Node.

If you decommission an Admin Node and single sign-on (SSO) is enabled for your StorageGRID system, you must remember to remove the node's relying party trust from Active Directory Federation Services (AD FS).

If you use grid federation, ensure that the IP address of the node you are decommissioning was not specified for a grid federation connection.

When you decommission a disconnected Admin Node, you will lose the audit logs from that node; however, these logs should also exist on the primary Admin Node.

You can't decommission a Gateway Node if one of its network interfaces is part of a high availability (HA) group. You must first remove the network interfaces from the HA group. See the instructions for managing HA groups.

As required, you can safely change ILM policies while decommissioning a Gateway Node.

If you use grid federation, ensure that the IP address of the node you are decommissioning was not specified for a grid federation connection.

You can safely decommission a Gateway Node while it is disconnected.