Almost every third party software that requires email integration provides support only for MS Exchange.
I have alot of customers asking to replace GroupWise with Exchange for obvious reasons.
The only way to implement Exchange is to migrate from OES Servers to MS Windows Servers with AD and then use Filr, iPrint and ZENworks in combination with them, but then I will lose all the benefits of eDir, NSS and many more of OES products and also all the custom software that was developed to work with eDir will need to be reengineered.
Could MicroFocus implement Exchange support to DSfW or maybe make it work in cross domain setups ? For example I will setup MS AD environment with domain controller and Exchange Server, setup cross domain trust between AD domain and DSfW domain and use DSfW users to link Exchange mailboxes to them.