Hola Sandy,
I wanted to see if you are still seeing the issue posted. Are you creating your pmf file on the server (network location) where everyone else can open the pmf file, where the performance is very slow for them. I would suggest to creating the mxd in the same location, along with having the source data also in the same location, and then build your .pmf file. Please let us know if this helps or you are still encountering the same issues. Gracias, Sandy!