When properties are synchronized from the drawing and the drawing is leading for that property, it would be nice that you're able to disable this property in Power, so the user doesn't have the possibility to change the value of that property in Power (as he should only change it in the drawing).
You can configure the title block properties and synchronization to determine if you want to update the properties only in the drawing, only in Meridian or in both. To do so you specific WO, RO, RW in the AMAcad.ini file. Example attached.
More information is available in Meridian Cloud Online Help and Configure Standard Title Block Configuration
The edit properties function can't be enabled / disabled for individual properties in Meridian Cloud.