In July 2018 we learnt that Exchange Server 2019 no longer contained the Unified Messaging (Voicemail and Auto-attendant) role. It figured that it was only a matter of time before Microsoft retired the service in Office 365. That time has now been announced. Microsoft is retiring Unified Messaging (UM) in Exchange Online and replacing it with Cloud Voicemail and Cloud Auto Attendant services. If...
Exchange Unified Messaging is the voicemail platform common to most Lync/Skype for Business installs but also supports PBX systems. We’ve recently seen a new toll fraud attack targeting Exchange UM’s to relay calls and either bypass call charges or run up charges on premium rate numbers. The attack relies on guessing or otherwise compromising users PINs. The attacker then calls the compromised...