Orion Platform 2018.4 products are no longer compatible with Windows Server 2012 and 2012 R2.
Orion Platform 2018.4 products are no longer compatible with any version of SQL Server 2012.
If you wrote your own code, by changing SolarWinds .css files or adding .js files, or were directed to maoke changes by SolarWinds Support, the code may be overwritten during the upgrade. See Upgrading if you have custom code.
Always check that you have enough hard drive space for zipped and unzipped installers. One unzipped installer can consume several GBs of space.
During your upgrade, use the Scalability Engine Installer. If you use downloaded installers or the installer bundle, you must install one product and version at a time. The versions must match between the main and additional polling engines or you will receive a Database Configuration Failure Error.
If you are upgrading from a very early or End of Life SolarWinds product version, you may want to install a new product instead of performing an upgrade or migrating data. SolarWinds Support can provide the best advice for these upgrade scenarios.
If you enabled SolarWinds High Availability, you must disable High Availability before you can upgrade. You must have the same versions of SolarWinds products on your primary and secondary servers before you can re-enable your HA pools.