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Question

FIRST, RUN THIS:  

Set-Mailbox -Identity <my email address> -ResetPeopleSuggestions $true  

This cmdlet runs against my Exchange Online mailbox. If it cannot be run, please confirm whether the limitation is due to permissions or module access.

SECOND, DO THIS:  

Make a temporary one‑character change to my display name in Entra ID, save it, wait 5 minutes, and then change it back.

This forces the Microsoft Profile Card Service to rebuild my identity object and flush stale attributes.

Can you please confirm whether this step was completed?

THIRD, DO THIS:  

Set-UserPhoto -Identity <my email> -Clear  

This clears the Exchange Online mailbox thumbnail photo.

If this cmdlet is not available in your session, that typically indicates a permissions or module‑loading limitation.

Answer 1

Hi @MARTHA Casad

Thank you for your follow up. 

I would like to clarify that this is a user-to-user forum. For advanced support, please reach out to the Support Team as mentioned in my previous response. 

That said, I did find a similar report shared by another user. You may want to review the discussion at How can I clear the user profile picture cache in Outlook for all of my users? - Software & Applica… and try the related troubleshooting steps. 

1/ Clear Outlook Cache:  

Press Windows + R > copy and paste the following path:  %LocalAppData%\Microsoft\Outlook\RoamCache > Delete all items in this folder. 

2/ Clear the PhotoCache: press Windows + R > copy and paste the following path:   %LocalAppData%\Temp\PhotoCache  > Delete all items in this folder.   

This information is provided as a convenience to you. These sites are not controlled by Microsoft, and Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please ensure that you fully understand the risks before using any suggestions from the above link.     

Please try the steps above and let me know if they help address the situation. Feel free to reach out whenever you have an update. 

Answer 2

Hi @MARTHA Casad   

For your request, you can proceed with reaching out to the Microsoft Support team through the options below. 

1/ Contact Microsoft Support via Phone

You can find the appropriate customer service phone numbers here: Customer service phone numbers - Microsoft Support  

Please note: An AI system may initially handle your call. Kindly follow the prompts carefully to be connected to a human support agent.  

2/ Ask your organization’s admin to raise a ticket  

Your Global Admin can submit a support request through the Microsoft 365 Admin Center. For step-by-step guidance, please refer to: Get support - Microsoft 365 admin | Microsoft Learn  

Before contacting Microsoft Support, I would like to share some clarification related to your questions to provide additional context. 

1/ The command Set-Mailbox -Identity <my email address> -ResetPeopleSuggestions $true cannot be executed because the Set-Mailbox cmdlet does not include the ResetPeopleSuggestions parameter.

You can verify this by reviewing the Set-Mailbox (ExchangePowerShell) | Microsoft Learn. The ResetPeopleSuggestions parameter is not listed, which confirms that it is not supported. 

2/ When the display name of a user is changed, the Object ID remains the same. This behavior is aligned with Microsoft design. The Object ID is generated once when the user account is created and remains permanently associated with that user, regardless of name changes. 

3/ Set-UserPhoto is supported only in on‑premises Exchange environments and is not available in Exchange Online. 

To clear a user photo in Exchange Online, you can use the following Microsoft Graph PowerShell commands: 

Connect-MgGraph -Scopes "User.ReadWrite.All" 
Remove-MgUserPhoto -UserId <UPN> 

For additional details and official references, you can review Set-UserPhoto (ExchangePowerShell) | Microsoft Learn 

I hope this provides helpful clarification and additional insight. 

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Answer 3

I am requesting Microsoft Support to complete these three tasks.