MS Outlook change subject line of all drafts - vba

Question

I need to change the subject line of 1000s of emails in my drafts.
Here is the code I'm using but it's not changing the subject line. Could someone please let me know what I'm missing.
Sub Drafts_Send()
Dim objDrafts As Outlook.Items
Dim objDraft As Object
Dim strPrompt As String
Dim nResponse As Integer
Dim i As Long
Set objDrafts = Outlook.Application.Session.GetDefaultFolder(olFolderDrafts).Items
For i = objDrafts.Count To 1 Step -1
If objDrafts.Item(i).Subject = "Please Thank You" Then
objDrafts.Item(i).Subject = "Please & Thank You"
objDrafts.Item(i).Save
End If
Next i
Set objDrafts = Nothing
End Sub

Answer 1

My guess is that the default Drafts folder is not the folder containing the drafts you wish to update.
Run this macro:
Sub DsplStoreContainingfDefaultDrafts()
Dim NS As Outlook.NameSpace
Dim DefaultInboxFldr As MAPIFolder
Set NS = CreateObject("Outlook.Application").GetNamespace("MAPI")
Set DefaultInboxFldr = NS.GetDefaultFolder(olFolderDrafts)
Debug.Print "Default Drafts folder in """ & DefaultInboxFldr.Parent.Name & """"
End Sub
On my system it outputs:
Default Drafts folder in "Outlook Data File"
“Outlook Data File” is the default store that came with the installation but it is only used for information not associated with an email account. Outlook has created a separate store for each of my email accounts with names like JohnSmith#AcmeIsp.com and JohnSmith#gmail.com. Each of those stores has its own Drafts folder and drafts are in the Drafts folder of the account from which I will send the email.
Go to the folder containing the drafts you wish to update. Is it within the store identified by my macro? If not continue reading.
The complication is that on my system, Drafts is a top level folder in the store for my regular ISP account but a second level folder in folder for my gmail account.
You will need to replace:
Set objDrafts = Outlook.Application.Session.GetDefaultFolder(olFolderDrafts).Items
Outlook.Application. is redundant since you are running this within Outlook.
If you store is like my regular ISP account, you will need something like:
Set objDrafts = Session.Folders("JohnSmith#AcmeIsp.com").Folders("Drafts").Items
If you store is like my gmail account, you will need something like:
Set objDrafts = Session.Folders("JohnSmith#gmail.com").Folders("[Gmail]").Folders("Drafts").Items

Answer 2

There are some tricks you can try.
.DoEvents, .GetInspector and as a last resort .Display.
Sub Drafts_Send()
Dim objDrafts As Items
Dim objDraft As Object
Dim i As Long
Set objDrafts = Session.GetDefaultFolder(olFolderDrafts).Items
For i = objDrafts.Count To 1 Step -1
If objDrafts.Item(i).Class = olMail Then
Set objDraft = objDrafts.Item(i)
With objDraft
If .Subject = "Please Thank You" Then
' this has some .Display behaviour, without displaying
.GetInspector
'.Display ' as a last resort
objDrafts.Item(i).Subject = "Please & Thank You"
DoEvents
' if in Draft folder reading pane should be off
.Save
End If
End With
Set objDraft = Nothing
End If
Next
Set objDrafts = Nothing
End Sub