When you are trying to sync contacts from BMS to IT Glue, if the Phone Number and Email fields are blank or has the word "N/A," the sync will fail.
The Phone Number and Email fields are required fields in a contact. They cannot be null. They should have text for the contacts to be synced.
If there is no number available for the contact, you can choose 111-111-1111 as a false number. If there is no email available for the contact, you can enter something in the format of email@example.com as a false email ID. The sync will then be successful.