> Hi, > > Is the EntryID property for an Outlook Folder guaranteed to be unique > across multiple mail stores? My Outlook add in currently persists the > only the EntryID of a folder selected by the user (typically in his > default mail store, but theoretically could be from any of the stores > available to the user) so as to be able to reference that folder. So > when I need a reference to this folder, I use > Namespace.GetFolderFromID(mySpecialFoldersEntryID), without specifying > a StoreID. Is this guaranteed to work even if the user subsequently > decides to configure multiple stores of any type? Or will I need to > persist the StoreID of the folder as well? >