A balloon message appears saying: "Error filing email"
For more information about the error open the Mail Manager Dashboard e.g.
From the Windows Notification Area (bottom right-hand corner of the screen) select the Mail Manager icon and choose "Show dashboard..."
Select the Session Log tab
The following error appears:
Failed to file email:
Unknown Error.
Error: 0x80040155, (-2147221163)
Function: Arup::Mapi::MapiProp::copy
Context: CopyTo.
This error indicates that Mail Manager is unable to communicate with the Outlook's data source.
Ensure Outlook is configured to "Use Cached Exchange Mode" e.g.
Outlook 2007: http://office.microsoft.com/en-us/outlook-help/turn-on-or-off-cached-exchange-mode-HP001232935.aspx?CTT=1#BM5
Outlook 2010: http://office.microsoft.com/en-us/outlook-help/turn-on-or-off-cached-exchange-mode-HP010355560.aspx
Outlook 2013: http://office.microsoft.com/en-us/outlook-help/turn-on-cached-exchange-mode-HA102809573.aspx?CTT=1