Microsoft Teams has VoIP calling by default, both between users in the organisation and over federation. Now cloud voicemail will be enabled by default all VoIP-enabled users in Microsoft Teams. Users will see the voicemail tab in their calls app in the app bar. If transcription is enabled for your tenant via Voicemail Policy, your users can also see voicemail transcriptions in their desktop clients, web clients, and in outlook clients.
This feature is on-by-default and requires administrator action to disable. Voicemail can be enabled/disabled via the AllowVoicemail setting in TeamsCallingPolicy.
You should verify that your users have the appropriate setting to ensure they are configured for your organization’s desired voicemail experience. If you disable voicemail for your users between now and late April, your settings will be honoured when the feature becomes available.
This has begun rolling out on all tenants now. It may take a few weeks to roll out across all tenants.