You are in a meeting or driving and need to reply to an email but cannot type. Outlook Mobile lets you record a short audio message and send it as an attachment in your reply. This feature uses the built-in microphone on your phone and does not require any third-party app. This article explains how to record and send a voice message in Outlook Mobile on both Android and iOS.
Key Takeaways: Sending a Voice Reply in Outlook Mobile
- Reply with a voice message button: Tap the microphone icon inside the reply compose window to start recording.
- Maximum recording length: Each voice message is limited to 60 seconds on iOS and Android.
- Automatic attachment: The audio file is attached as an .m4a file and plays inline for the recipient.
What the Voice Reply Feature Does in Outlook Mobile
Outlook Mobile includes a voice recording tool that lets you reply to an email with a short audio clip. The feature is built into the reply composer and does not require any add-ins or additional permissions beyond microphone access. When you send a voice message, Outlook attaches the recording as an audio file that the recipient can play directly in their email client or on their phone.
The voice reply option works on both Android and iOS versions of Outlook Mobile. You must have the Outlook app version 4.2203.0 or later on Android and version 4.22.0 or later on iOS. The feature is enabled by default and does not require any administrative configuration in Microsoft 365.
Steps to Record and Send a Voice Message in Outlook Mobile
- Open the email you want to reply to
Launch Outlook Mobile and tap the email message in your inbox. The message opens in full view. - Tap the reply button
At the bottom of the screen, tap the curved arrow icon labeled Reply. A popup menu appears with Reply, Reply All, and Forward options. Select Reply or Reply All as needed. - Locate the microphone icon
In the compose window that opens, look at the right side of the text input area. You will see a small microphone icon. On iOS it appears next to the send button. On Android it appears above the keyboard area. - Tap and hold the microphone icon to start recording
Press and hold the microphone icon. A waveform animation appears to show recording is active. Speak your message clearly into the phone microphone. Keep your message under 60 seconds. Release the icon when you finish speaking. - Review and send the voice message
After you release the microphone, the audio clip appears as an attachment in the compose window. You can tap the play button to listen to your recording. If you want to redo it, tap the delete icon next to the attachment and repeat step 4. When you are ready, tap the send arrow.
The recipient receives the email with an audio attachment named VoiceMessage.m4a. On most devices the audio plays inline when the recipient taps the play button. No additional software is needed.
Limitations and Things to Avoid When Using Voice Replies
Recording length is capped at 60 seconds
Outlook Mobile stops recording automatically at 60 seconds. If you need to send a longer message, record multiple voice clips and send them in separate replies or combine them into a single email with multiple attachments. Alternatively, use the voice recording app on your phone and attach the file manually.
Voice messages do not transcribe automatically
Outlook does not convert your speech to text. The recipient must listen to the audio file. If you are replying to someone who cannot play audio or who has a hearing impairment, type a text reply instead. You can also dictate text using the on-screen keyboard microphone on iOS or Android, which inserts speech-to-text directly into the email body.
Audio quality depends on your phone microphone and environment
Record in a quiet space. Hold the phone close to your mouth. Background noise like traffic, wind, or other conversations can make the audio hard to understand. If the recipient cannot hear you clearly, they may ask you to resend the message as text.
Voice messages do not work in all Outlook Mobile versions
If you do not see the microphone icon, update Outlook Mobile to the latest version from the Google Play Store or Apple App Store. The feature is not available on Outlook for Windows desktop, Outlook for Mac, or the Outlook web app. It only works in the mobile app.
Voice Reply vs Typed Reply vs Dictation: Key Differences
| Item | Voice Reply (Microphone Icon) | Typed Reply | Dictation (Keyboard Microphone) |
|---|---|---|---|
| Input method | Record audio with hold-to-talk | Type on keyboard | Speak, text is inserted automatically |
| Output format | Attached .m4a audio file | Plain text in email body | Plain text in email body |
| Recipient experience | Must play audio to hear message | Reads text directly | Reads text directly |
| Recording limit | 60 seconds maximum | No limit | No limit but requires internet for cloud dictation on iOS |
| Works offline | Yes, audio is recorded locally | Yes | No, requires internet on iOS; Android works offline with Gboard |
Choose the voice reply method when you need to convey tone or urgency and cannot type. Use dictation if you want the recipient to read your words immediately. Type your reply when you need precision or when the recipient cannot play audio.
You can now send a quick voice message from Outlook Mobile without switching to a separate app. Try using the voice reply feature for short status updates or confirmations while you are on the go. For longer messages, consider recording multiple 60-second clips or dictating text using the keyboard microphone.