The option to allow or prevent access is found under the advanced properties of a report in the Report Manger.
To get to it:
1. Open your Report Manager and select the report you want to work with.
2. Select the Show Advanced checkbox at the bottom of the Properties tab.
3. Look for the Allow Report Viewer and External Access option towards the bottom of the tab.

At this point, there are a few things to be aware of:
- If you’re designing a new report from scratch then by default this
option is unchecked, and so Viewer access will not be provided. If
you’re finished with your report and want to grant access, then select
the option.
- If you’re basing your new report off an out-the-box (locked) report
having made a copy of it, this option will be checked by default and so
if you would like to restrict Viewer access, you’ll need to unselect it
until you’re done.
- Following on from the above, this means that users will always have
Viewer access to out-the-box reports, as changing the option on a locked
report isn’t possible.
- Restricting access to a report hides it in the Viewer, and so users will not even be aware that it exists.
- If your Sage accounting package or business solution includes a Sage
Intelligence reports menu, then the option is also used to show or hide
reports there.