We're planning an upgrade of our RHEL8 idM server. Currently, this is a single instance without any replicas. The documentation states that one can generate SIDs as an Administrator on another idM replica. Is it a requirement to have a replica environment before planning to upgrade the idM to RHEL9? Reported by: maros https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/migrating_to_identity_management_on_rhel_9/assembly_migrating-your-idm-environment-from-rhel-8-servers-to-rhel-9-servers_migrating-to-idm-on-rhel-9#annotations:f33e03d4-6294-43d8-90bc-76fd3e532dd3
Yes, two servers are required. The SME answer: "[w]e do not support in-place upgrade between major RHEL versions. It means in order to upgrade from RHEL 8 to RHEL 9 one needs to introduce RHEL 9 server (replica) to existing topology (RHEL 8 server). That implies you need, at least temporarily, two servers."