I logged in as an administrator with Adviser access rights. But the user can't see the menu item for PDF reports under Reporting Menu.
Do I need to change any other settings? How can resolve this one?
If you have ever modified permissions through menu "Users & Companies" - "Groups", you could have accidentally removed someone's inherited permission.
To see the "PDF Reports" menu, the user needs to have "Accounting & Finance / Accountant"; "Advisor" users should be in such group automatically unless later removed.
Please enable the developer mode, go to "Users & Companies" - "Groups", search for "Accountant", then open "Accounting & Finance / Accountant" and make sure the related admin user is inside under the "Users" tab.