How to fix error message "The operation cannot be performed because the object has been deleted?" when sending an email?

Ryan, Samantha 20 Reputation points

When sending an email, I often get the error message, "The operation cannot be performed because the object has been deleted", despite me not doing anything different compared to when it does send. Sometimes it fixes itself, but other times it takes days to resolve. Does anyone know a way to fix this? Thank you.

A family of Microsoft email and calendar products.
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Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Rojas, Evelyn 15 Reputation points

    I also would like to add that at least half of our organization is affected and every day we add more people to this problem. All the 3 current issues we are facing, affect the classic Outlook, there's definitely something wrong there and Microsoft is not giving us any solution.

    2 people found this answer helpful.
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  2. Jeff Crowe 5 Reputation points

    I do want to add that this error has been persistent for half of our org of 70+ employees for the last 6 weeks. We've been running Repairs on the ost files which has helped slightly, but this comes up again shortly thereafter for some of our users. Simply recreating dozens of profiles is not a sustainable fix. I'm really surprised there's not an Advisory alert in the admin center about this.

    1 person found this answer helpful.

  3. Tunrip 85 Reputation points

    We've also started experiencing these errors over the last few weeks.

    We're using Outlook with Office 365. I notice that a "Sync Issue" and "Local Failure" item is also generated. The Synchronization Log entry shows:

    16:43:45                                 [8004010F-501-8004010F-320] 16:43:45                                 The client operation failed. 16:43:45                                 Microsoft Exchange Information Store 16:43:45                                 For more information on this failure, click the URL below: 16:43:45                       

    Can't find anything that looks currently relevant to this error - most Google results are when using Outlook with IMAP which is not the case here.

    1 person found this answer helpful.
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  4. SokiGuo-MSFT 25,751 Reputation points Microsoft Vendor

    Hi @Ryan, Samantha

    Welcome to our forum!

    This error message usually indicates an issue with Outlook’s data files or synchronization problems. Here are some steps you can try to resolve this issue:

    • Sometimes this error occurs when Outlook data files corrupt, therefore, you can try to Repair Outlook Data Files (.pst and .ost).
    • Check your account settings: If you’re using an IMAP account, you might need to specify the “Inbox” in the root folder path.
    • Create a new Outlook profile: In some cases, creating a new profile entirely can resolve persistent issues with sending emails.

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