Please follow below steps to export emails from multiple folders or subfolders to Excel workbooks with VBA in Outlook.

1. Press Alt + F11 keys to open the Microsoft Visual Basic for Applications window.

2. Click Insert > Module, and then paste below VBA code into the new Module window.

VBA: Export emails from multiple folders and subfolders to Excel

Const MACRO_NAME = "Export Outlook Folders to Excel"

Sub ExportMain()
ExportToExcel "destination_folder_path\A.xlsx", "your_email_accouny\folder\subfolder_1"
ExportToExcel "destination_folder_path\B.xlsx", "your_email_accouny\folder\subfolder_2"
MsgBox "Process complete.", vbInformation + vbOKOnly, MACRO_NAME
End Sub
Sub ExportToExcel(strFilename As String, strFolderPath As String)
Dim      olkMsg As Object
Dim olkFld As Object
Dim excApp As Object
Dim excWkb As Object
Dim excWks As Object
Dim intRow As Integer
Dim intVersion As Integer

If strFilename <> "" Then
If strFolderPath <> "" Then
Set olkFld = OpenOutlookFolder(strFolderPath)
If TypeName(olkFld) <> "Nothing" Then
intVersion = GetOutlookVersion()
Set excApp = CreateObject("Excel.Application")
Set excWkb = excApp.Workbooks.Add()
Set excWks = excWkb.ActiveSheet
'Write Excel Column Headers
With excWks
.Cells(1, 1) = "Subject"
.Cells(1, 2) = "Received"
.Cells(1, 3) = "Sender"
End With
intRow = 2
For Each olkMsg In olkFld.Items
'Only export messages, not receipts or appointment requests, etc.
If olkMsg.Class = olMail Then
'Add a row for each field in the message you want to export
excWks.Cells(intRow, 1) = olkMsg.Subject
excWks.Cells(intRow, 2) = olkMsg.ReceivedTime
excWks.Cells(intRow, 3) = GetSMTPAddress(olkMsg, intVersion)
intRow = intRow + 1
End If
Next
Set olkMsg = Nothing
excWkb.SaveAs strFilename
excWkb.Close
Else
MsgBox "The folder '" & strFolderPath & "' does not exist in Outlook.", vbCritical + vbOKOnly, MACRO_NAME
End If
Else
MsgBox "The folder path was empty.", vbCritical + vbOKOnly, MACRO_NAME
End If
Else
MsgBox "The filename was empty.", vbCritical + vbOKOnly, MACRO_NAME
End If

Set olkMsg = Nothing
Set olkFld = Nothing
Set excWks = Nothing
Set excWkb = Nothing
Set excApp = Nothing
End Sub

Public Function OpenOutlookFolder(strFolderPath As String) As Outlook.MAPIFolder
Dim arrFolders As Variant
Dim varFolder As Variant
Dim bolBeyondRoot As Boolean

On Error Resume Next
If strFolderPath = "" Then
Set OpenOutlookFolder = Nothing
Else
Do While Left(strFolderPath, 1) = "\"
strFolderPath = Right(strFolderPath, Len(strFolderPath) - 1)
Loop
arrFolders = Split(strFolderPath, "\")
For Each varFolder In arrFolders
Select Case bolBeyondRoot
Case False
Set OpenOutlookFolder = Outlook.Session.Folders(varFolder)
bolBeyondRoot = True
Case True
Set OpenOutlookFolder = OpenOutlookFolder.Folders(varFolder)
End Select
If Err.Number <> 0 Then
Set OpenOutlookFolder = Nothing
Exit For
End If
Next
End If
On Error GoTo 0
End Function

Function GetSMTPAddress(Item As Outlook.MailItem, intOutlookVersion As Integer) As String
Dim olkSnd As Outlook.AddressEntry
Dim olkEnt As Object

On Error Resume Next
Select Case intOutlookVersion
Case Is < 14
If Item.SenderEmailType = "EX" Then
GetSMTPAddress = SMTPEX(Item)
Else
GetSMTPAddress = Item.SenderEmailAddress
End If
Case Else
Set olkSnd = Item.Sender
If olkSnd.AddressEntryUserType = olExchangeUserAddressEntry Then
Set olkEnt = olkSnd.GetExchangeUser
GetSMTPAddress = olkEnt.PrimarySmtpAddress
Else
GetSMTPAddress = Item.SenderEmailAddress
End If
End Select
On Error GoTo 0
Set olkPrp = Nothing
Set olkSnd = Nothing
Set olkEnt = Nothing
End Function

Function GetOutlookVersion() As Integer
Dim arrVer As Variant
arrVer = Split(Outlook.Version, ".")
GetOutlookVersion = arrVer(0)
End Function

Function SMTPEX(olkMsg As Outlook.MailItem) As String
Dim olkPA As Outlook.propertyAccessor
On Error Resume Next
Set olkPA = olkMsg.propertyAccessor
SMTPEX = olkPA.GetProperty("http://schemas.microsoft.com/mapi/proptag/0x5D01001E")
On Error GoTo 0
Set olkPA = Nothing
End Function

3. Please adjust the above VBA code as you need.

(1) Replace destination_folder_path in above code with the folder path of destination folder you will save the exported workbooks in, such as C:\Users\DT168\Documents\TEST.
(2) Replace your_email_accouny\folder\subfolder_1 and your_email_accouny\folder\subfolder_2 in above code with the folder paths of subfolders in Outlook, such as \Inbox\A and \Inbox\B

4. Press the F5 key or click the Run button to run this VBA. And then click the OK button in the popping out Export Outlook Folders to Excel dialog box. See screenshot:

And now emails from all specified subfolders or folders in above VBA code are exported and saved into Excel workbooks.

Export emails by date range to Excel file or PST file in Outlook

Export and print list of all folders and subfolders in Outlook