Our customer have licenses for Unified Messaging and he don't want to synchronize with corporate exchange for security policy. So I intalled Unified Messaging in the same server(AD+Exchange) with it's own domain, but forwared all voicemail to corporate exchange that is another domain just the same I lost the synchronize of read message (message waiting lamp) when is forwarded the mail to corporate exchange.
Question: Is there an option for to know if the mail was readed from Corporate Exchange for OFF MWI in the IP Phone?
Is there any options for this deployment?