Local calendar "Mail Ccripts"

On my computer "somebody" has created a local calendar called "Mail scripts". I can imagine who this somebody could be because all entries in that calendar come from other people using either Outlook or Exchange or Lotus. My problem is that these entries do not appear in my iCloud calendars. I need to convert them manually. This is annoying and error prone because entires recorded during my absence are not displayed while I make new appointments.

Which is the best way to deal with the issue? Publish the calendar "Mail Scripts"? Or convert the entries by a script? Or …?

Please help!