'Option Explicit
Sub CUSTOM_Subject()
Dim xItem As Object
Dim xNewSubject As String
Dim xMailItem As MailItem
Dim xExplorer As Explorer
Dim i As Integer
On Error Resume Next
Set xExplorer = Outlook.Application.ActiveExplorer
For i = xExplorer.Selection.Count To 1 Step -1
    Set xItem = xExplorer.Selection.Item(i)
    If xItem.Class = olMail Then
        Set xMailItem = xItem
        With xMailItem
            xNewSubject = Replace(.Subject, "xDATEx", Format(Date - 1, "dd/mm/yyyy"))
            .Subject = xNewSubject
            .Save
        End With
    End If
Next

End Sub

Sub DAILY_CUSTOM()
    Dim strFind, strReplace As String
    Dim objInspectors As Outlook.Inspectors
    Dim objInspector As Outlook.Inspector
    Dim objMail As Outlook.MailItem
    Dim objMailDocument As Word.Document
'    Dim objSubject As Word.Document
    Dim objSubject As String
 
'Enter the specific text
'    strFind = InputBox("Enter the text for find: (Case Sensitive)")
'    strReplace = InputBox("Enter the text for replacement: (Case Sensitive)")

strFind = "xDATEx"
'strFind = "xDATEx"
strReplace = "Format(Date - 1, "dd/mm/yyyy")"
'strReplace = "Format(Date - 1, "dd/mm/yyyy")"
 
    If Trim(strFind) <> "" Then
       Set objInspectors = Outlook.Application.Inspectors
 
       For Each objInspector In objInspectors
           If objInspector.CurrentItem.Class = olMail Then
              If objInspector.EditorType = olEditorWord Then
                 Set objMail = objInspector.CurrentItem
                 Set objMailDocument = objMail.GetInspector.WordEditor
                 
                 'Find & replace specific text
                 With objMailDocument.Content.Find
                      .ClearFormatting
                      .Text = strFind
                      .Replacement.ClearFormatting
                      .Replacement.Text = strReplace
                      .Forward = True
                      .Wrap = wdFindContinue
                      .Format = False
                      .MatchCase = True
                      .MatchWholeWord = False
                      .Execute Replace:=wdReplaceAll
                End With
                objMail.Save
             End If
         End If
      Next
      
Dim xItem As Object
Dim xNewSubject As String
Dim xMailItem As MailItem
Dim xExplorer As Explorer
Dim i As Integer
On Error Resume Next
Set xExplorer = Outlook.Application.ActiveExplorer
For i = xExplorer.Selection.Count To 1 Step -1
    Set xItem = xExplorer.Selection.Item(i)
    If xItem.Class = olMail Then
        Set xMailItem = xItem
        With xMailItem
            xNewSubject = Replace(.Subject, strFind, strReplace)
            .Subject = xNewSubject
            .Save
        End With
    End If
Next
 
      MsgBox "Completed!", vbInformation + vbOKOnly
    End If
End Sub



Sub DAILY_CUSTOM_BODY()


    Dim strFind, strReplace As String
    Dim objInspectors As Outlook.Inspectors
    Dim objInspector As Outlook.Inspector
    Dim objMail As Outlook.MailItem
    Dim objMailDocument As Word.Document
'    Dim objSubject As Word.Document
    Dim objSubject As String
 
'Enter the specific text
'    strFind = InputBox("Enter the text for find: (Case Sensitive)")
'    strReplace = InputBox("Enter the text for replacement: (Case Sensitive)")

strFind = "xDATEx"
strReplace = Format(Date + 3, "dd/mm/yyyy")
 
    If Trim(strFind) <> "" Then
       Set objInspectors = Outlook.Application.Inspectors
 
       For Each objInspector In objInspectors
           If objInspector.CurrentItem.Class = olMail Then
              If objInspector.EditorType = olEditorWord Then
                 Set objMail = objInspector.CurrentItem
                 Set objMailDocument = objMail.GetInspector.WordEditor
                 
                 'Find & replace specific text
                 With objMailDocument.Content.Find
                      .ClearFormatting
                      .Text = strFind
                      .Replacement.ClearFormatting
                      .Replacement.Text = strReplace
                      .Forward = True
                      .Wrap = wdFindContinue
                      .Format = False
                      .MatchCase = True
                      .MatchWholeWord = False
                      .Execute Replace:=wdReplaceAll
                End With
                objMail.Save
             End If
         End If
      Next
      
      MsgBox "Completed!", vbInformation + vbOKOnly
    End If
End Sub