A "SMTP address" is created in the format of alias@UnityConnectionDomain for every subscriber that is added. When a user is deleted, the “SMTP address” does not seem to get deleted. If you attempt to re-create the same user after you have deleted it, the “SMTP address” becomes LongHexString@UnityConnectinDomain. If you try to change it back to alias@UnityConnectionDomain, a message indicate that the SMTP address is already exists.

Does anyone know how to delete the SMTP address for subscriber? I'm running Unity Connection 7.0.2.10000-38