To begin with, you can check the synchronization mode associated with the 1st security level yourself. However, in order to verify the synchronization mode associated with the 2nd level of security, you must send your request by email to firstname.lastname@example.org.
What is interesting with CentrixOne is that the synchronization mode associated with the 1st level of security can vary between users. However, this will depend on the configuration in the 2nd security level.
This means that you could assign the one-way mode for most of your users, in order to secure information, while unlocking the two-way mode for some users who can then modify the information of primary contacts and accounts synchronized with QuickBooks.
In order to determine the synchronization mode associated with your user, you just have to try to modify a primary contact’s details. If a message appears telling you that you do not have the rights to modify this contact, then this means that your user has one-way permission. If you can edit this contact, then your user has two-way permission.