How to send or receive an XER without sending or getting extra codes, calendars, etc from a large system? I know that if you use something of other than an xer you have more control but I am trying to keep it simple. From what I recall you CANNOT control what you send but they can select options in the import. But if you are importing a schedule that has no outside the schedule links could you juse use "keep existing" on every item - wouldn't activity changes still come through? Most people do not "update an existing schedule with an xer they import a new version of an existing schedule. Even if there is an old version of the schedule, why would that effect "update existing" because there should be no connection between them. The 4 choices on import seem similar: Update Existing, keep existing, Insert New, Do not import. Any tips?