ZCO: Why am I getting Local Failure Notices?

Sometimes Outlook with ZCO user may receive Local Failure Notices within their Inbox.
The most likely reason for the notice is the Zimbra Connector momentarily not being able to sync certain data with the server during the last scheduled sync cycle.
Basically, this message lets you know it temporarily lost connection between your Outlook and the Zimbra server and the notice is giving you a warning of that connection loss.

99% of the time these messages can be ignored as it is a routine message and you have nothing to worry about. The Zimbra Connector will sync the data during the next scheduled sync cycle.

Here is an example of Local Failure Notice:

This e-mail was generated for technical support purposes.

Sync Type: Delta Sync

Sync Token (before request): 26759

Sync Token (most current): 26759

Store: Zimbra -

Computer Name:

Version: 6.0.5981.7

Error IDs:

id (35855) type(message)