I have 6 emails account in my outlook. I wonder if I can read 6 email inbox Set oInbox = oNS.GetDefaultFolder(olFolderInbox)like  read a inbox then read c inbox.  read is different email address

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Reply from Alex Hedley:

This is untested but should work for research

Dim objNS As Outlook.NameSpace
Dim objFolder As Outlook.MAPIFolder
Set objNS = GetNamespace("MAPI")
Set objFolder = objNS.Folders("OTHER MAILBOX NAME")
Set objFolder = objFolder.Folders("Inbox")