The following should work, provided your sharepoint path is correct
Code:
Sub Exec_Summary2()
'
Dim objWord As Object
Dim oDoc As Object
Dim sUserName As String: sUserName = Environ$("username")
Dim oCC As Object
On Error Resume Next
Set objWord = GetObject(, "word.application")
If Err.Number <> 0 Then
On Error GoTo 0
Set objWord = CreateObject("Word.Application")
End If
objWord.Visible = True
Set oDoc = objWord.Documents.Open("https://XXXX-my.sharepoint.com/personal/" & UserName & "_XXXX/Documents/_MyProfile/Desktop/Business%20Executive%20Summary%20MASTER.docx?web=1")
For Each oCC In oDoc.ContentControls
Select Case UCase(oCC.Title)
Case "CASENAME" 'This is the name being referenced for CC in Word
oCC.Range.Text = Range("CAseName") 'This is the cell being referenced in excel
Case "TITLE OF CONTROL 2"
'oCC.Range.Text = whatever
Case "TITLE OF CONTROL 3"
'oCC.Range.Text = whatever
'etc
End Select
Next oCC
Set objWord = Nothing
Set oCC = Nothing
Set oDoc = Nothing
End Sub