Hi @Lee, Jason J ,
Welcome to Q&A forum!
- Product Usage: Yes. After the end of support date in 2026, you can still continue to use your existing SharePoint 2019 On-Premises system.
- Technical Support: Yes, you will not be able to receive paid support from Microsoft, except for the Q&A forum where you can post questions. However, the support provided by the forum is limited.
- Security risks: After the security updates are stopped, there are many risk factors that we cannot confirm.
- Upgrade suggestions: There are two options for you to choose from:
Upgrade to SharePoint Server Subscription Edition. SharePoint Server SE is the latest version of SharePoint server. To upgrade from Microsoft SharePoint Server 2019 to SharePoint Server Subscription Edition, you can use the database-attach method.
Migrate to SharePoint Online. You can use the migration tool SPMT provided by Microsoft to migrate.
In summary, for the security of your information, it is recommended to upgrade or migrate before the end of support.
Have a nice day! :-)
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