Have used MS Project 2003 for years. On that, when you send an mpp file to someone, they can open and make edits, but like I said, new to Project 2010. Anyway, when I sent an mpp file to my Project Manager it came through read only with the tool ribbon at the top greyed out. Right clicked on the file and checked the General tab and neither the Read-Only or Hidden boxes are checked. Need to be able to send the manager a fully functional file.