While using custom or other security roles and trying to modify the existing policy for the Product/Solution (Patch, Inventory, Software), the user might encounter an error message during saving:
ITMS 8.x
Missing permissions for this security role
In Security Role Manager, select the role that lacks this permission.
Navigate to the Policies view and then select the specific Solution type policy you want this role to be allowed to modify the policy:
For example, here it enables Cloned Role to manage Patch Solution policies: