Customers occasionally contact Support because the Workbooks Outlook Connector has suddenly stopped working / disappeared / "uninstalled" itself". e.g. "It seems my Outlook Connector has broken.  Outlook froze, a message popped up, I clicked disable and my Outlook closed. Help!"

This is usually caused by Outlook crashing, laptop running out of battery, computer being restarted without closing Outlook.

In summary, Outlook and it's add-ins are ended abruptly, and as a safety measure the add-in is disabled.

The solution is usually straightforward - Re-enable the Workbooks Outlook Connector:

Outlook 2007: Tools > Trust Centre > Enable the WOC > Close Outlook > Open Outlook.

Outlook 2010: File > Options > Add-ins > Manage: Disable items > Enable the WOC > Close Outlook > Open Outlook.