Here's a workaround that I found for saving the Maplex settings so that the settings carry over when opening/sharing an MXD on another computer: 1. Open a blank MXD. 2. Go to the Labeling Tool in your tool bar. On the Label drop-down, select "Use Maplex Label Engine". 3. Then, go to File - Open - navigate to where you saved the shared MXD and open your MXD. The Maplex settings should be carried over to your MXD. Hope this helps.
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