Yes my win server 2012R2 has the full license
Aggiornamento windows server 2012 R2
Vorrei aggiornare windows server 2012 R2 a windows server 2019 ma quando eseguo la procedura con il prodotto in versione di prova il sistema non mi permette di selezionare l'opzione Keep personal files and apps
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Leon Laude 85,816 Reputation points
2020-07-14T10:19:59.277+00:00 Hi,
Is your Windows Server 2012 R2 fully licensed? It is not possible to perform an in-place upgrade of an evaluation version, a Windows Server evaluation version can only be converted to the same retail edition.
To upgrade to Windows Server 2019 you will need to get a Windows Server 2019 product key.Upgrade Windows Server 2012 R2 to Windows Server 2019
https://learn.microsoft.com/en-us/windows-server/upgrade/upgrade-2012r2-to-2019Upgrade and conversion options for Windows Server 2016 (also applies to Windows Server 2019)
https://learn.microsoft.com/en-us/windows-server/get-started/supported-upgrade-pathsBest regards,
Leon