Hi @Vid3al ,
Thank you for posting in Microsoft Q&A forum.
==>Do we need to install the "Microsoft ODBC Driver for SQL Server 18.1.0" on top of all these systems?
Per my experience, yes, we need to install Microsoft ODBC Driver 18 on every node that has the site system role installed before the upgrade process. Similar threads for your reference:
Microsoft ODBC driver 18 for SQL setup Issue with SCCM 2309 Upgrade
Thanks for your time. Have a nice day!
Best regards,
Simon
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