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Voicemail and Teams phone security basics
Toll fraud and voicemail hacks still happen. A short hardening list for modern phone systems.
Phone systems are computers with DIDs attached. Defaults are often too trusting.
Basics
- Strong PINs; disable remote voicemail access if unused
- Restrict international dialing by default
- Review auto-attendants and call queues after staff changes
- Treat Teams Phone admin roles as privileged
Toll fraud signal
Sudden spikes in international or premium-rate calls deserve an immediate carrier and IT call.
Need a telephony access review? Open a ticket.