Initially, I have installed Enterprise Evaluation Edition and then we have installed licensed version Standard Edition 2017.
All our apps using SQLSTANDARD instance and backup maintenance jobs were running fine.
Suddenly, I have found that the jobs are failing with this error,
Integration Services evaluation period has expired
I ran,
SELECT * FROM msdb.dbo.syssubsystems
and it returns C:\Program Files\Microsoft SQL Server\140\DTS\Binn\DTExec.exe
I have also changed registry,
But still same error. The maintenance jobs created from licensed Standard Edition version.
I have tired of this and switch it to use https://ola.hallengren.com/