Bulk edit the information associated with a list of contacts

The contact must already exist. If it does not exist, no operation will be performed.

You can reference the contact by contactId, channelContactId or externalCode. If you use externalCode, it is possible that more than one contact is updated.

If you want to update the externalCode of a contact, you must provide the contactId or channelContactId.

A maximum of 250 contacts can be indicated in a single request