You have to complete the path to the folder. If it is on the same level as Inbox then
Sub ChangeViewtoFolderDatenbank() Dim ns As Outlook.NameSpace Dim Exp As Outlook.Explorer Dim folder1 As Folder Set ns = Application.GetNamespace("MAPI") Set Exp = Application.ActiveExplorer Set folder1 = ns.GetDefaultFolder(olFolderInbox).Parent.folders.Item("Datenbank") Set Exp.CurrentFolder = folder1 End Sub