
Run Outlook in Normal Mode (Non-Compatibility Mode)Ĭompatibility mode is used to run applications that are not compatible to run in the current OS. After updating, restart Outlook and check if Outlook is functioning normally.Ģ.Click on the Update Now for updating the software.If the current error is a result of a bug that Microsoft has already patched in its latest updates, then updating the Outlook to the latest version may solve the problem. Microsoft frequently releases updates for Outlook to improve its performance, add new features to it and to fix bugs in it. Also, if you are on a corporate network, then inform your organization’s I.T. How to Resolve the Operation Failed Attachment Error on Outlook?īefore moving with troubleshooting make sure you have administrator access to the system.

If they are not set properly or they restrict attachments, you will experience the attachment error message.

If you are using an older version of Outlook, then you are inclined to many issues. Older Version of Outlook: To keep the pace up with the emerging technologies, Microsoft releases an updated build of Outlook now and then.There are numerous reasons for this issue to occur, we’ve gathered almost all of them as listed below. Why does Outlook returns operation failed attachment error?
