By default, Google creates a contact for every email sent to someone new and places it under the Other Contacts label. If Riva's Sync All New option is enabled for contacts, Riva creates all such contacts in the CRM — but some may be quite irrelevant for the CRM.
Article ID: 593
Last updated: 23 Mar, 2017
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Riva On-Premise - CRM Sync -> Manage Riva On-Premise (Admin Guides) -> Email Systems -> Google (Gmail) -> Errors & Troubleshooting