Disable hidden mailboxes sync to Front contacts or make it optional

If the mailbox is hidden from the Global address list, it will not show in Outlook's address book, and will not populate in the "To" field if you draft a new message.

But despite the mailbox being hidden, if Outlook directory sync is enabled in Front, the hidden mailbox will appear in Front contacts.

Desired outcome: mailboxes hidden from the Global address list in Exchange should not sync to Front contacts, or there should be a switch to either sync them or not.