I know there is an update library,update symbol & update other objects function.
However once a part is placed in schematic and library & database has been changed
those properties changed on parts do not seem to update.
The only way to update seems to delete the part and place a new one after all these updates are done.
Any ideas I would think these tools should update schematic with ALL new library data.
If you are using DxDatabook with some sort of parametric database associated then after symbol update run a Live Verification or Hierarchical Verification to check for missing properties.