(Updated) Microsoft Teams: Enhanced delegated calling with delegate call access restrictions and join notifications

Updated September 22, 2026: We have updated the timeline. Thank you for your patience.

What and Why

Microsoft is enhancing Microsoft Teams call delegation with new controls that provide greater privacy, transparency, and control during active calls. Delegators will be able to lock active calls to prevent delegate participation and optionally enable warning tones that notify participants whenever a delegate joins or resumes a call. These enhancements help users manage sensitive conversations more effectively while improving awareness during delegated call handling.

This message is associated with Roadmap ID 567306.

Rollout Schedule

• Targeted Release (Worldwide): We will begin rolling out in early August 2026 and expect to complete by mid-August 2026.
• General Availability (Worldwide): We will begin rolling out in mid-August 2026 and expect to complete by mid-August 2026.
• General Availability (GCC, GCC High): We will begin rolling out in mid-August 2026 and expect to complete by late August 2026.
• General Availability (DoD): We will begin rolling out in mid-August 2026 and expect to complete by end of October 2026 (previously mid-September).

Impact on Your Organization

Who is affected

• Users with Microsoft Teams call delegation configured.
• Executives, administrative assistants, managers, and support personnel who use delegated calling.

Platforms/Services

• Microsoft Teams
• Teams Calling
• Teams desktop
• Teams web

What will happen

• A new Lock an Ongoing Call capability will be available to delegators.
• Delegators can lock an active call to prevent delegates from:
• Delegates will continue to see locked calls in their call history.
• Delegates will be unable to participate in locked calls until the delegator unlocks the call.
• A new optional Warning Tone for Delegate Participation setting will be available.
• When enabled, all call participants will hear an audible notification when a delegate:
• The feature increases transparency regarding delegate participation in live calls.
• This change will be available by default to users with call delegation configured.
• No existing call delegation workflows are removed.

• Resuming a call that has been placed on hold.
• Joining an ongoing active call.

• Joins an active call.
• Resumes a held call.

Action Required/Recommendations

No immediate administrative action is required.

Recommended actions:

• Review how call delegation is used within your organization.
• Inform users who utilize delegated calling about the new lock and notification capabilities.
• Update internal Teams calling documentation and training materials.
• Notify help desk and support teams of the new user experience to prepare for potential questions.
• Evaluate whether the delegate participation warning tone should be recommended for users handling confidential or sensitive conversations.
• Monitor Microsoft's official documentation for feature configuration details as rollout approaches.

Learn more: Share a phone line with a delegate in Microsoft Teams | Microsoft Support (will be updated for GA rollout)

Compliance Considerations