If you notice that your events haven't been logging to Salesforce, please make sure your calendar is still connected to Salestrail and the events you're looking for aren't in Unlogged Activities.
To avoid duplication logging, Salestrail does not log events that have multiple matches. All of these events are kept in Unlogged Activities, and users can choose to delete or log them manually.
To manually log an event, please follow these steps:
Tap on the event in Unlogged Activities that you want to log manually.
Assign the event to the accurate existing Salesforce contact OR create a new Salesforce Account/Contact/Lead.
And now your event has been logged to Salesforce!