Hello. We have Mitel NuPoint Voicemail- Build: 16.0.0.51.01 (MAS - 5.0.64.0) with unified messaging all flavors. Since we went to the cloud and moved away from exchange 2010 we now have just SMTP. We are using the MAPI Gateway configuration version 8.0.1.with an exchange server host as autodiscover.outlook.com. The exchange server domain is a host name not an IP address which is the issue in a nut shell. When we build a user we add them to Active Directory and then synch to the cloud. Please let me know if you can help. Our users got spoiled with delete synchronization. I don't blame them