Quick Outlook macro to automatically accept a meeting request, and notify you that it has been accepted. Use the Alt+F11 combo to pull up the VBA editor. To utilize the function, you will need to add a rule that uses the "Run a script" action.

AutoAcceptMeetings.vba

Sub AutoAcceptMeetings(oRequest As MeetingItem)
 
If oRequest.MessageClass <> "IPM.Schedule.Meeting.Request" Then
  Exit Sub
End If
 
Dim oAppt As AppointmentItem
Set oAppt = oRequest.GetAssociatedAppointment(True)
 
Dim oResponse
  Set oResponse = oAppt.Respond(olMeetingAccepted, True)
  oResponse.Save
  oResponse.Send
  MsgBox "You accepted a meeting request from " + oRequest.SenderName + ":\n" + oAppt.Subject + "\n" + oAppt.Start, vbInformation, "Meeting Request"
  oRequest.Delete
End Sub