Allowing Voicemail Messages from Microsoft Teams

Created by Jason Carreiro, Modified on Fri, 27 Aug 2021 at 02:15 PM by Yves Lacombe

As a workaround, a rule can be added to the Exchange Admin Center in Office 365 to allow voicemail messages from Microsoft. To create this rule:

1. Navigate to Exchange Admin Center > Mail Flow > Rules

2. Click on "Create a new rule"

3. Create a new rule that:

Name: Teams Bypass

Apply this rule if: "The message type is"> include the message type > "Voice Mail"


Sender's IP address is in the range ",,,,, 2603:1027::/48, 2603:1037::/48, 2603:1047::/48, 2603:1057::/48, 2620:1ec:6::/48, 2620:1ec:40::/42

[please check Microsofts documentation for their latest Teams IP addresses - see]  

Do the following...

"Require TLS Encryption"

Chose a mode for this rule: Enforce

Check "Stop processing more rule"

4.  Click Save

5.  Ensure the completed rule is placed above the Proofpoint block rule

The completed rule will look like: