I did, but I still did not get my question answered.

In the above article you give me:

it also says:

The two types of roles complement each other and should be used together. For this reason, adding a user to a report server is a two-part operation. If you assign a user to an item-level role, you should also assign them to a system-level role

So my understanding is even I just want to grant users to view reports, which is item-level access, I still need to add the users to system -level,

is this correct?

thanks