Is Collaboration Manager able to add any resources as Participant without any access right?
What kind of access right is granted to Participant?
Collaboration access right is unique access right and it is different from Instance or Global Access right.
No one grants this access right to any resource.
Only Collaboration manager is able to add any resource to Project Team as participants and Participant will have Collaboration access right.
Participant is also granted "Project - View Base" access right.