Is there a way to reassign the owner of a Planner where the owner is no longer in the company? The Planner is in a private channel.

A Planner tab in a Teams private channel is not supported, so recover the plan through Planner itself by identifying its actual container and restoring access there rather than trying to transfer ownership through the private channel. ^1^

1. Identify the existing plan and its container

Since the ownership-transfer instructions you already followed did not restore access:

1. Open the plan directly in the Planner web app rather than through the private-channel tab.
2. If it appears under your plans, open it and determine which Microsoft 365 group or other container is associated with it.
3. If it does not appear, give your Microsoft 365 administrator:
   • The plan URL, if available.
   • Parent team and private-channel names.
   • Former owner’s account.
   • Correlation ID: [GUID]
   • Timestamp: 2026-11-04T18:50:22.657Z

Planner access is controlled by the plan’s container. Plans can be held by a Microsoft 365 group, meeting, channel, or another supported container, so changing ownership of the parent team or an unrelated group does not necessarily grant access. ^2^

2. If it is confirmed as a Microsoft 365 group-backed plan

An Exchange administrator, Groups administrator, or User administrator should add the replacement user as both a member and an owner of that specific group:

1. Open Microsoft 365 admin center.
2. Go to Teams & groups → Active teams & groups.
3. Select the group identified as the plan’s container.
4. Under Membership → Members, select Add members, add the replacement user, and save.
5. Under Owners, add the same user as an owner.

Membership grants access to the group’s Planner resources; ownership alone might not. Microsoft’s Graph documentation likewise states that an owner who needs to make changes in Teams, such as creating a Planner plan, must also be a group/team member. ^3^ Administrators with the applicable roles can change Microsoft 365 group membership. ^4^

If the replacement user is already a group owner but not a member, there is also a self-service route:

1. Open Outlook.
2. Go to Groups; if it is hidden, use More apps.
3. Select Discover groups.
4. Find the relevant group and select Request to join.

A group owner should be added as a member without requiring another owner’s approval. Do not change the user’s role from owner to member; the user needs both relationships. ^5^

3. Check the private-channel membership separately

Being a parent-team owner does not automatically grant access to a private channel. The user must be an owner or member of that private channel, and its membership is managed in Teams—not independently through its SharePoint site. When a departed private-channel owner is removed from the organization or team’s Microsoft 365 group, an existing private-channel member is automatically promoted to owner. ^1^

A current channel owner should open:

Teams → private channel → More options (…) → Manage channel → Members

Then add the replacement user and, if needed, promote that user to channel owner. This restores channel access, but it does not substitute for membership in a separate container that owns the plan.

4. If the group cannot be found or access still fails

Have the administrator check these conditions:

• Ownerless group: In Teams & groups → Active teams & groups, filter for Ownerless groups, select the matching group, and assign an owner. ^6^
• Deleted group: A deleted Microsoft 365 group is normally retained for 30 days; restoring it also restores associated Planner content. After that period, the group and associated content cannot be restored through this process. ^7^
• License or permission change: Verify that Microsoft Planner remains enabled under the affected user’s Licenses and apps, and review the audit log for group deletion or membership changes around the time access was lost. ^8^

If no matching container can be identified—or if the plan was exposed through an old, website-based, or otherwise unsupported private-channel tab—the Microsoft 365 administrator should open Microsoft 365 admin center → Support → New service request. Include the plan URL, private-channel details, correlation ID, timestamp, and the membership changes already attempted. Avoid deleting or recreating the tab until support identifies the underlying plan, because a replacement tab would not recover the original tasks.

References

1. IT Admins - Private channels in Microsoft Teams
2. Security, privacy, and compliance in Microsoft Planner
3. Add owners
4. Add or remove members from Microsoft 365 groups using the admin center
5. Resolving Permission Issues When Adding a Planner Tab to a Teams Channel | Microsoft Support
6. Manage ownerless Microsoft 365 groups and teams
7. Restore a deleted Microsoft 365 group
8. How to fix Planner error: You do not have access to this plan - Microsoft Q&A