MC898392 – Microsoft Teams: UDP Signaling Ports configuration change (archived)

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check before: 2024-10-01

Product:

Exchange, Outlook, Teams

Platform:

Education, Online, Web, World tenant

Status:

Launched

Change type:

Admin impact

Links:

49152

Details:

Summary:
Microsoft Teams is updating UDP signaling ports for Calling and Meetings to enhance efficiency. The source ports will change from 49152-65535 to 50070-50089, with the destination UDP port remaining at 3478. Rollout begins early October 2024. Admins should allow the new UDP source ports to the specified destination ports.

Details:
Coming soon: To enhance the efficiency of Microsoft Teams, we will implement a significant update to the UDP signaling ports used for Calling and Meetings.
Before this rollout, Teams uses UDP Source Ports 49152-65535 for Calling and Meetings signaling API Calls. This includes functionality such as mute/unmute, hold, adding participants, and reactions.
After this rollout, Teams will transition UDP signaling from source ports 49152-65535 to 50070-50089, maintaining the destination UDP port 3478. This change aims to reduce the number of ports used and enable you to apply Quality of Service (QoS) DSCP markers to this traffic.
When this will happen: General Availability (Worldwide): We will begin rolling out early October 2024 and expect to complete by early October 2024.

Change Category:
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Scope:
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Release Phase:
General Availability

Created:
2024-09-26

updated:
2024-09-26

Task Type

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Docu to Check

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MS Preperations

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MS Urgency

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MS workload name

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linked item details

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summary for non-techies**

Starting in early October 2024, Microsoft Teams will narrow its signaling port range from 49152-65535 to 50070-50089, while still directing traffic to port 3478, and Outlook on the web will allow users to choose between bold and light colors for calendar events.

Direct effects for Operations**

UDP Signaling Ports Change
If the change is implemented without proper preparation, users may experience disruptions in calling and meeting functionalities such as mute/unmute, hold, and adding participants due to blocked ports.
   - roles: IT Administrators, End Users
   - references: https://learn.microsoft.com/microsoft-365/enterprise/urls-and-ip-address-ranges?view=o365-worldwide#microsoft-teams

Quality of Service (QoS) Implementation
Without prior adjustments, the new UDP ports may not be recognized by existing network configurations, leading to degraded call quality and increased latency during Teams meetings.
   - roles: Network Engineers, End Users
   - references: https://learn.microsoft.com/microsoft-365/enterprise/urls-and-ip-address-ranges?view=o365-worldwide#microsoft-teams

User Experience in Teams
Failure to prepare for the port change could result in users facing connectivity issues, leading to frustration and decreased productivity during critical meetings.
   - roles: End Users, IT Support Staff
   - references: https://learn.microsoft.com/microsoft-365/enterprise/urls-and-ip-address-ranges?view=o365-worldwide#microsoft-teams

Configutation Options**

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Opportunities**

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Potentional Risks**

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IT Security**

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explanation for non-techies**

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** AI generated content. This information must be reviewed before use.

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Last updated 2 months ago

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