We currently use IMS on 4.2 and are thinking of switching to UMS, because IMS causes delays in starting Outlook with even moderate sized mailboxes (and terrible if you have lots of inbox subfolders). The only problem I can see (besides cost, don't get me started about no credit for IMS licenses), is that the IMAP integration is just an email with an attachment. If I'm understanding this right, you lose the option you get with IMS to listen to the message through the phone. The only way I can see to keep that functionality is through the web client. Am I understanding the options correctly? If so, does Avaya have any plans to add the listen via phone option to the IMAP client?