Whenever you change some of the WebOffice plot extension properties or do some changes on the layout files in the layout directory then you change the WebOffice plot extension properties.
Note: In order to let the WebOffice plot extension changes take effect in your WebOffice 10 R3 client, you must at least perform the actions ‘Restart ArcGIS Server Map Service’ as well as ‘Reload resources for WebOffice 10 R3 project’.

SynerGIS Plot extension properties
Typical changes are
•Added/deleted/changed layout files (Print templates),
•Changed Layout path,
•Changed Output Image Quality,
•Etc.