today (as I arrived in a hotel abroad), Outlook (2010) stopped downloading and synchronising, but sending emails that are written in Outlook seems to work.
I keep getting the following identical Local Failure Notices:

This e-mail was generated for technical support purposes.

Sync Type: Delta Sync

Sync Token (before request): 721548

Sync Token (most current): 721548

Store: Zimbra - Steffi Friedrichs

Computer Name: STEFFI-LASTDELL

ZCO Version: 7.1.3.6348

Server Version: 7.1.3_GA_3374

Error IDs:
id (243849) type(folder)