Hi @glennescarayan,
It's not quite clear what exactly you want to upgrade. If you want to upgrade SQL Server, see this: Upgrade or patch replicated databases
The upgrade path to SQL Server is different depending on the deployment pattern. SQL Server offers two upgrade paths in general:
Side-by-side: Deploy a parallel environment and move databases along with the associated instance level objects, such as logins, jobs, etc. to the new environment.
In-place upgrade: Allow the SQL Server installation media to upgrade the existing SQL Server installation by replacing the SQL Server bits, and upgrading the database objects. For environments running Always On Availability Groups or Failover Cluster Instances, an in-place upgrade is combined with a rolling upgrade to minimize downtime.
Best regards,
Seeya
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