Add Appointment to Specific Outlook Calendar from Access

I was just able to successfully add an appointment from access to outlook using the general instructions here:

http://www.access-programmers.co.uk/forums/showthread.php?t=31517

However, our setup is like this...We have a call-center where people take sales calls.  They schedule a salesman to go out--and his calendar is the one that must be updated.

The Outlook calendars run off of an Exchange Server, and the salesmens' calendars are shared.

Anyone know how I can take the code I have and modify it to add the appointment to a specific calendar (a salesperson's shared calendar) rather than just the default (mine)?

Thanks!

'I FOLLOWED THIS CODE GENERALLY
 
Private Sub AddAppt_Click()
' Save record first to be sure required fields are filled.
DoCmd.RunCommand acCmdSaveRecord
' Exit the procedure if appointment has been added to Outlook.
If Me!AddedToOutlook = True Then
MsgBox "This appointment already added to Microsoft Outlook"
Exit Sub
' Add a new appointment.
Else
Dim outobj As Outlook.Application
Dim outappt As Outlook.AppointmentItem
Set outobj = CreateObject("outlook.application")
Set outappt = outobj.CreateItem(olAppointmentItem)
With outappt
.Start = Me!ApptDate & " " & Me!ApptTime
.Duration = Me!ApptLength
.Subject = Me!Appt
If Not IsNull(Me!ApptNotes) Then .Body = Me!ApptNotes
If Not IsNull(Me!ApptLocation) Then .Location = _
Me!ApptLocation
If Me!ApptReminder Then
.ReminderMinutesBeforeStart = Me!ReminderMinutes
.ReminderSet = True
End If
.Save
End With
End If
' Release the Outlook object variable.
Set outobj = Nothing
' Set the AddedToOutlook flag, save the record, display a message.
Me!AddedToOutlook = True
DoCmd.RunCommand acCmdSaveRecord
MsgBox "Appointment Added!"
Exit Sub
AddAppt_Err:
MsgBox "Error " & Err.Number & vbCrLf & Err.Description
Exit Sub
End Sub

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