16 June 2015 17:05pm EDT
This issue has been corrected and the synchronization of statistics should begin to normalize over the next few hours. The operations team found that a deployment of a service patch caused some processing resources to be over-utilized. Please allow a few hours for synchronization to return to normal.
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16 June 2015 15:45pm EDT
Our operations team is currently investigating an issue that is causing a delay in the synchronization of email statistics to our customers' CRM systems. This delay is impacting only customers whose accounts are registered in the US data center. Emails are still being sent normally. The delay is only in synchronizing the statistics back to CRM. We will post updates here as they become available.