Teams Voicemail appended recording missing in audio attachment (Exchange 2019 on-prem)

Hello,

We are experiencing a very specific issue with **Microsoft Teams Phone System voicemail** in a hybrid environment and I’m trying to determine if this is a limitation or a configuration problem.

### Environment

* Microsoft Teams Phone System (Cloud Voicemail)

* Resource Accounts, Auto Attendants and Call Queues

* SBC (Direct Routing) – working normally

* Hybrid identity (AAD Connect)

* **Exchange Server 2019 on-premises mailboxes (NO Exchange Online mailbox)**

Voicemail messages are delivered successfully to users in Outlook via email and transcription works.

---

### The problem

When a caller leaves a voicemail and simply records a message → everything is normal.

However, if the caller uses the **voicemail review menu** after recording:

> presses **#** and then selects **“4 – continue recording”**

the caller records a second part of the message (appended recording segment).

Result we observe:

| Component | Behavior |

| ---------------------------------- | ---------------------------------- |

| Voicemail transcription | Contains BOTH parts of the message |

| Audio attachment in Outlook (.wav) | Contains ONLY the first recording |

| Delivery | Successful (no NDR) |

So the voicemail transcription is complete, but the audio attachment is truncated to the first segment.

This only occurs when the caller chooses **continue recording** and creates a multi-segment voicemail.

Has anyone else seen appended or multi-segment voicemail recordings being truncated when delivered to **Exchange on-premises mailboxes**?

Is this a known limitation of Cloud Voicemail delivery to legacy/non-Exchange Online mailboxes, or is there a configuration required to properly render appended voicemail recordings?

Any confirmation from others running Teams Phone with Exchange on-prem would be greatly appreciated.

Thank you.