Try this, I also have posting trying to have text use scroll bar on slide:
On the Edit menu, click Links.
Click the linked object (linked object: An object that is created in a
source file and inserted into a destination file, while maintaining a
connection between the two files. The linked object in the destination file
can be updated when the source file is updated.) you want to update.
To select multiple linked objects, hold down CTRL while you click each object.
THEN . . .
Do one or more of the following:
To update a linked object each time you open the file that contains it — or
any time the object changes while the file is open — click Automatic or
Automatic update.
To update a linked object only when you click Update Now, click Manual or
Manual update