Virtual app and Desktop Upgrade sequence from 1906 to 2006 version

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Instructions

-Install the SQL management studio
-Take the backup of the SQL files 
-Check the SQL version 
-Upgrade the SQL express to version 2016 or above(Latest is sql express 2019)
Download link:https://www.microsoft.com/en-us/sql-server/sql-server-downloads
Download the SQL advanced package 
-Upgrade the storefront 
-Run the VDA cleanup utility
-Upgrade the Delivery controller, studio and License server 
-Upgrade the database automatic
-Install the VDA component.
-Checked application and desktop launched
 

https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/upgrade-migrate/upgrade.html