This setting allows multiple notes clients to run locally.
If a cluster server has the Notes_ISOLATION environment variable or NOTES.INI ISOLATION variable set, it will appear as available in Show Cluster output (cluster probes will succeed) from other servers, but cluster replication to the server will not succeed.
Ensure that Notes_ISOLATION and ISOLATION are not set for Domino 4.5x servers.
NOTE: The env command may be used to check the process environment for the Notes_ISOLATION variable.