Tick tock.
SQL Server 2017 extended support ends on October 12, 2027.
That means today, you need to start working through this list of labor-intensive tasks:
Talk to your compliance, insurance, and legal people to see if your company is subject to any rules or regulations that mean you’re not allowed to run software if it isn’t under manufacturer support Talk to your accounting and licensing people to see if your 2017 & prior servers are licensed with Software Assurance, giving you the ability to upgrade at no charge, or if you’re going to need to add licensing to