Upgrade Scenarios when Working with Historian Server Certificates

Be aware of the following when upgrading your Historian:

• By default, certificate-based security is enabled. Your configuration for certificates is automatic, unless you are installing or upgrading a distributed/mirror node. If you do not configure your certificates in this scenario, your Historian services may not start when you go to run it for the first time.
• You will need to regenerate the certificates if you uninstall the existing version and reinstall any version that supports certificate-based security.
• You will need to regenerate the certificates for Historian in-place upgrades that support certificate-based security.
• You will NOT need to regenerate the certificates for SIM over SIM upgrades that support the MTLS feature.