In addition, the items in the folder are standard IPM message classes, so that custom forms and folder views apply. However, interoperability is not always that simple. A more accurate way to explain interoperability between the different versions of Exchange Clients is to list all of the clients and their level of interoperability. The following table lists levels of interoperability between all of the Exchange Clients. Only simple interoperability is available.
Full interoperability is available.
It may be helpful to review all of the clients with their features to see which features are available. The following table outlines the available client features. However, it is possible to supplement this with HTML forms that are based on Outlook 32-bit forms. HTML forms allow these clients to connect to OWA and for an HTML version of the form. However, these clients can open and reply to a voting message that is sent from an Outlook 32-bit client.