There is a command group 'az_storagesync_registered server'. This group of commands could 'manage registered server'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_storagesync_registered server_delete'.The syntax is: az storagesync registered-server delete --server-id
                                        --storage-sync-service
                                        [--no-wait]
                                        [--resource-group]
                                        [--yes]. The 1th example of the child command would be to use it to 'unregister an on premises server  41166691 ab03 43e9 ab3e 0330eda162ac  from it s storage sync service  samplestoragesyncservice', the syntax is: az storagesync registered-server delete --resource-group "SampleResourceGroup" --storage-sync-service \
"SampleStorageSyncService" --server-id "41166691-ab03-43e9-ab3e-0330eda162ac". The parameter '--server-id' is required. It is used to guid identifying the on-premises server.. The parameter '--storage-sync-service' is required. It is used to the name or id of storage sync service.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--resource-group -g' is optional. name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--yes -y' is optional. do not prompt for confirmation.. 