Give user a ssis_logreader permission to SSISDB database and they can view full SSIS Report Outputs.

https://docs.microsoft.com/en-us/sql/ssms/download-sql-server-management-studio-ssms?view=sql-server-2017

https://www.microsoft.com/en-us/download/details.aspx?id=56128

https://support.microsoft.com/en-us/help/4338363/cumulative-update-8-for-sql-server-2017  

Grab it from here: https://support.microsoft.com/en-us/help/4229789/cumulative-update-7-for-sql-server-2017

Get it here: https://docs.microsoft.com/en-us/sql/ssms/download-sql-server-management-studio-ssms?view=sql-server-2017

Grab it from here: https://support.microsoft.com/en-us/help/4101464/cumulative-update-6-for-sql-server-2017

Get it from here: https://docs.microsoft.com/en-us/sql/ssms/download-sql-server-management-studio-ssms

Grab it from here: https://support.microsoft.com/fi-fi/help/4092643/cumulative-update-5-for-sql-server-2017

Grab it from here: https://docs.microsoft.com/en-us/sql/ssms/download-sql-server-management-studio-ssms