How to get all mail ids from outlook

To get all mail IDs from Outlook, you can use the following methods:

Method 1: Using VBA Macro

1. Open Outlook and go to the Visual Basic Editor by pressing Alt + F11 or by navigating to Developer > Visual Basic in the ribbon.

2. In the Visual Basic Editor, click Insert > Module to insert a new module.

3. Paste the following code:

   Sub GetAllMailIds()
    Dim olApp As New Outlook.Application
    Dim olNamespace As Outlook.Namespace
    Dim olFolder As MAPIFolder
    Dim olItems As Items
    Dim i As Integer
   
    Set olApp = New Outlook.Application
    Set olNamespace = olApp.GetNamespace("MAPI")
    Set olFolder = olNamespace.GetDefaultFolder(olFolderInbox)
    Set olItems = olFolder.Items
   
    For i = 1 To olItems.Count
        Debug.Print olItems(i).EntryID
    Next i
   
    Set olItems = Nothing
    Set olFolder = Nothing
    Set olNamespace = Nothing
    Set olApp = Nothing
   End Sub

4. Click Run to execute the macro. This will print all the mail IDs to the Immediate window.

Method 2: Using PowerShell

1. Open PowerShell and run the following command:

   $ol = New-Object -ComObject Outlook.Application
   $namespace = $ol.GetNamespace("MAPI")
   $inbox = $namespace.GetDefaultFolder([Microsoft.Office.Interop.Outlook.OlDefaultFolders]::olFolderInbox)
   $items = $inbox.Items
   $items | ForEach-Object { Write-Host $_.EntryID }

   This will print all the mail IDs to the console.

Method 3: Using Outlook's built-in feature

1. Open Outlook and go to the File > Open & Export > Export to a file.
2. Select Comma Separated Values (CSV) as the file format.
3. Choose the Inbox folder and select all items.
4. Click Export to export the items to a CSV file.
5. Open the CSV file in a text editor or spreadsheet software and extract the EntryID column, which contains the mail IDs.

Note: The EntryID is a unique identifier for each email message in Outlook. You can use this ID to retrieve the email message using the GetItemFromID method.