check before: 2025-09-15
Product:
Teams
Platform:
Online, US Instances, World tenant
Status:
Change type:
Feature update, User impact, Admin impact
Links:
Details:
Summary:
Microsoft Teams will update the sender email for channel guest invitations from noreply@microsoft.com to no-reply@teams.mail.microsoft between September and October 2025. This automatic change improves email delivery, requires no user action, and may need updates to email filtering or allow lists.
Details:
Introduction
To support backend service improvements and enhance email deliverability, Microsoft Teams is updating the default sender address used for guest access invitations to Teams channels. This change helps ensure consistent delivery and recognition of invitation emails.
When this will happen
General Availability (Worldwide): We will begin rolling out mid-September 2025 and expect to complete by early October 2025.
General Availability (GCC): We will begin rolling out early October 2025 and expect to complete by mid-October 2025.
General Availability (GCC High and DoD): We will begin rolling out mid-October 2025 and expect to complete by late October 2025.
Change Category:
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Scope:
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Release Phase:
Created:
2025-09-06
updated:
2025-09-06
Task Type
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Docu to Check
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MS How does it affect me
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MS Urgency
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MS workload name
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summary for non-techies**
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Direct effects for Operations**
Email Filtering Issues
The change in sender email address may cause existing email filtering rules to block or misroute guest invitation emails, leading to missed invitations and communication breakdowns.
- roles: IT Administrators, Help Desk Staff
- references: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-teams-updated-sender-email-address-for-channel-guest/ba-p/3851230
User Confusion
Users may not recognize the new sender address, leading to confusion about the legitimacy of the emails and potential disregard of important invitations.
- roles: End Users, Team Leaders
- references: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-teams-updated-sender-email-address-for-channel-guest/ba-p/3851230
Support Call Increase
The change may lead to an increase in support calls as users encounter issues with guest invitations not being received or recognized, straining help desk resources.
- roles: Help Desk Staff, IT Support Managers
- references: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-teams-updated-sender-email-address-for-channel-guest/ba-p/3851230
Configutation Options**
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Opportunities**
Email Filtering and Security Policies Update
The change in sender email address necessitates a review and potential update of email filtering and security policies to ensure that the new sender address is recognized and permitted. This can enhance overall email deliverability and reduce the risk of important communications being filtered as spam.
- next-steps: Conduct an audit of current email filtering and security policies, and update them to include no-reply@teams.mail.microsoft. Communicate these changes to relevant teams to ensure compliance.
- roles: IT Administrators, Security Teams, Help Desk Teams
- references: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-teams-updates-sender-email-address-for-channel-guest/ba-p/3654565
User Communication and Training
Informing users about the change in sender email address can help mitigate confusion and support calls. This proactive communication can enhance user experience and ensure that users recognize the new sender address for guest invitations.
- next-steps: Develop a communication plan to inform users about the upcoming change, including FAQs and support resources. Schedule training sessions or create documentation to assist users in understanding the implications of this change.
- roles: Communications Teams, Help Desk Teams, Training Coordinators
- references: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-teams-updates-sender-email-address-for-channel-guest/ba-p/3654565
Improved Email Deliverability Monitoring
With the new sender address, organizations can monitor email deliverability more effectively. Tracking the success rate of email invitations sent from the new address can help identify any potential issues early on and improve overall communication efficiency.
- next-steps: Implement monitoring tools to track email deliverability rates for the new sender address. Analyze the data regularly to identify trends or issues and adjust email policies as needed.
- roles: IT Administrators, Data Analysts, Compliance Officers
- references: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-teams-updates-sender-email-address-for-channel-guest/ba-p/3654565
Potentional Risks**
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IT Security**
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explanation for non-techies**
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Last updated 2 weeks ago ago
