I am researching this issue for a while now and it seems that if a user was given a Full Access permission to a shared mailbox, the user with Full Access should be able to view the quarantined emails and release them.
I have this scenario that the user has already full access permission but when clicking the "view" button from the quarantine notification, the user is redirected to protection.office.com/quarantine and received an error message:
"The operation couldn't be performed because the user does not have the authorization"
May I kindly confirm if the user should be able to view and release it? It is a shared mailbox without a password setup.
I have also this same scenario (using shared mailbox also with full access permission) and the user can review and release the emails from protection.office.com/quarantine
Should I try to re-assign the Full Access permission to the user?