Planner share with external users

Question

EN:
We are experiencing an issue with Microsoft Planner guest access.

What we tested:

• Created Guest Users with both Gmail and Outlook.com accounts
• Added guests to the related Teams group
• Membership is visible correctly in Microsoft 365 Groups / Exchange / Teams
• “Let guest group members access group content” is enabled
• External Identities settings were checked
• Created a basic Planner plan
• The plan appears under “My Plans”
• Planner tab is also visible inside Teams

However, when opening the plan, guests receive: “You no longer have access to that data” or “You do not have access”

Has anyone experienced a similar issue with Planner guest access?
The external account appears in the "my plans" section, but it gives an error when I try to access it. (The planner created a basic plan and is assigned an E5 license.)

TR:
TR:

Microsoft Planner guest access konusunda bir problem yaşıyoruz.

Yaptığımız işlemler:

• Gmail ve Outlook.com hesapları ile Guest User oluşturduk
• Kullanıcılar Teams grubuna eklendi
• Microsoft 365 Group / Exchange / Teams tarafında üyelikler doğru görünüyor
• “Let guest group members access group content” ayarı aktif
• External Identities ayarları kontrol edildi
• Basic Planner plan oluşturuldu
• Planner “My Plans” altında plan görünüyor
• Teams altında Planner sekmesi de görünüyor

Ancak plan açılmaya çalışıldığında: “You no longer have access to that data” veya “You do not have access”

hatası alıyoruz.

Guest access senaryosunda benzer problemi yaşayan oldu mu?

Answer 1

Since your post includes multiple languages in an English forum, I’ll provide the response in English for clarity. Please feel free to let me know if you would prefer the information in another language. 

Hi @FN,

Good day, and I appreciate the clear explanation of your concern.  

Based on your description, this issue is typically caused by one of a few common scenarios:

• First, the guest may not have fully completed the invitation process, so the account is not fully activated in the tenant.
• Second, the guest might be accessing Planner from the wrong tenant context, using the generic URL instead of the tenant-specific link.
• In addition, there could be an SMTP conflict in Exchange Online. If the guest’s email already exists there (for example, as a contact), it can lead to access errors and prevent Planner from working properly. Reference: Guests have no access to assigned Planner tasks - Microsoft 365 Apps | Microsoft Learn.

For reference: Guest access in Microsoft Planner | Microsoft Support.

You can try the following troubleshooting steps :

1/ Confirm invitation redemption

Ask the guest to locate the original invitation email and complete the onboarding process using the provided access link.

 

2/ Test using the tenant-specific Planner URL

Instead of accessing the generic Planner page, ask the guest to sign in using the tenant-specific link:

https://planner.cloud.microsoft/<yourtenantdomain>

Microsoft explains that the general planner.cloud.microsoft URL does not identify which organization a guest is trying to access. Using the tenant-specific URL ensures the guest is directed to the correct environment and is the recommended method for guest access.

3/ Test from the Team’s Planner tab instead of the Planner app / My Plans

Guest users in Teams may not always be able to fully access Planner through the standalone app or the “My Plans” view. However, they should be able to use Planner within the context of a Team channel.

To test this, please try the following:

• Open the Team
• Navigate to the channel where the plan is pinned
• Open the Planner tab from within that channel.

4/ Remove and re-add the guest, then complete the invitation again

If the guest appears correctly in the group but still cannot access the plan:

• Remove the guest from the Team or Microsoft 365 Group
• Allow some time for directory changes to synchronize
• Add the guest again
• Ask the guest to complete the invitation process again using the original welcome email

5/ Check for an SMTP conflict in Exchange Online

There is an issue where guest access to Planner can fail if the same email address is already assigned to another object in Exchange Online, such as a mail contact.

Please ask your IT admin to check in the Exchange admin center under Recipients > Contacts to see if the guest email address is already in use. If a duplicate is found, updating or removing it may resolve the issue.

Reference: Guests have no access to assigned Planner tasks - Microsoft 365 Apps | Microsoft Learn.

 

If the issue continues, I recommend asking your IT admin to open a support ticket through the Microsoft 365 Admin Center by following the steps here: Get support - Microsoft 365 admin | Microsoft Learn . 

This allows Microsoft support engineers to investigate further, including backend membership synchronization, guest object conflicts, and Planner service behavior at the tenant level.

If you’re unsure who your IT admin is, you can find guidance here: How do I find my Microsoft 365 admin? - Microsoft Support. 

I hope this information helps you move forward. If you have any questions or need further clarification, please feel free to reach out. I’ll be glad to assist.

Thank you for your understanding, and I look forward to continuing to support you.

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Answer 2

The behavior matches a known limitation and configuration dependency of Planner guest access rather than a licensing issue with the E5 account.

Key points from the documented guest model:

1. Planner guest access is built entirely on Microsoft 365 Groups guest access.
   • If Microsoft 365 Groups guest access is disabled or restricted, guests can be added to the group/Team but still be unable to open the plan itself.
   • Ensure Microsoft 365 Groups guest access is fully enabled as described in Guest access in Microsoft Planner and Manage guest access in Microsoft 365 Groups (referenced from the admin FAQ).
2. Guests must be added to the underlying Microsoft 365 Group and complete the invitation.
   • The documented flow is:
     1. A group owner adds the guest to the group.
     2. The guest receives a welcome email and must accept it to create/activate the guest account.
     3. To access the plan, the guest must sign in using the tenant-specific Planner URL: https://planner.cloud.microsoft/<organizationdomainname> rather than the generic Planner URL.
   • If guests try to open the plan via the generic Planner URL or before the guest account is fully provisioned, they can see the plan listed under My plans but receive “You no longer have access to that data” / “You do not have access” when opening it.
3. Planner guest permissions are limited but do include opening and working in the plan once group guest access is correct.
   • Guests can create/delete buckets and tasks, edit task fields, and edit the plan name.
   • They cannot invite other guests or change private plan settings.
4. Known guest-related error for comments (for comparison).
   • There is a documented case where guests see “You no longer have access to <task GUID>” when commenting, caused by an SMTP address conflict in Exchange Online.
   • The fix is to change or remove the conflicting mail contact in Exchange Online.
   • While this specific article is about task comments, it shows that duplicate SMTP addresses for guest users can cause “no longer have access” errors; checking for such conflicts in Exchange Online is recommended if the guest account was previously used as a mail contact.

Recommended admin checks and actions

1. Verify Microsoft 365 Groups guest access:
   • Confirm that guest access to Microsoft 365 Groups is enabled at the tenant level and not restricted for the specific group that backs the plan.
   • Ensure “Allow guests to be added to all Microsoft 365 groups” is configured as described in the Planner guest documentation.
2. Confirm guest invitation completion and sign-in path:
   • Make sure each guest has:
     • Received and accepted the group welcome email.
     • Created/activated the guest account via the Access files link in that email.
   • Instruct guests to open Planner using the tenant-specific URL https://planner.cloud.microsoft/<organizationdomainname> and then open the plan from My plans.
3. Check for Exchange Online recipient conflicts (if errors persist):
   • In the Microsoft 365 admin center → Admin centers → Exchange → Recipients → Contacts, look for any contact or recipient using the same SMTP address as the guest.
   • If found, change that contact’s SMTP address or remove the contact so the guest’s address is unique.

Once Microsoft 365 Groups guest access is fully enabled, the guest invitation is accepted, and there are no conflicting Exchange recipients, guests should be able to open the Planner plan without receiving the “You no longer have access” / “You do not have access” messages.

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References:

• Guest access in Microsoft Planner
• Frequently asked questions for admins about Microsoft Planner
• Guests in the Microsoft 365 admin center
• Guests can't add comments to assigned Planner tasks
• Guest access in Microsoft Teams
• Let guests see your project in Project for the web

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