To set security levels to issues user must have access to Set Issue Security at project's Permission Scheme.
In Issue Security Scheme create Issue Security Level to allow access to secured issues only to granted groups, users or roles.
On "Add User/Group/Project Role to Issue Security level" screen you can find CRM's Security groups:
| Security Group | Users who will have access to issues | How to set |
|---|---|---|
| Company employees | Reporter's colleagues (from same company in CRM). | How to set Reporter's colleagues access to issues |
| Holding employees | Reporter's colleagues, employees of parent company, employees of all child companies and employees of companies which have the same parent as reporter's company | Add Parent and Child companies attributes to CRM Company |