Client has 17 PAM Clusters and each Cluster with 2 PAM nodes. Totaling 34 PAM Appliances in Vmware.
They would start the upgrade from version 4.0.2 gradually keeping during transition until all pam nodes are upgraded the pam client 4.0.2 and 4.1.3 working for the same Windows machine.
Release : 4.0
Every time we are on 4.0.2 and we go to 4.1.3 and again we go back to 4.0.2 it is working without problems if user access the new 4.1.3 PAM node will receive message of version Change and if accept will update the PAM client. When accessing 4.0.2 the process will be the same.
Wait the update process to finish until 100%
It's always good before and after updating the PAM Client connecting to a PAM server with a different version the first time, closing the client and reopening it to ensure closing a lock file that the PAM Client creates in tmp folder