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To perform any operation with respect to PowerFlex, Gateway VM must be installed and accessible in the network.
Note: After the overcloud deployment is completed, ensure to check the REST connectivity in Gateway Server. If the REST connectivity is not successful, then ensure to update gatewayUser.properties file available in this location:/opt/emc/scaleio/gateway/webapps/ROOT/WEB-INF/classes/. For more information, see Configure and Customize Dell EMC PowerFlex v3.5.x.