Some of the Microsoft Outlook users are complaining that they are facing the ‘Outlook Operation Failed Attachment’ error. They face this error while trying to launch the attachments in send email or text. The complete errors displays: The operation failed. An object cannot be found. In this situation, users cannot launch attachments or send messages with Outlook. If you are one of them, then follow the steps mentioned below to fix this issue. Checking Outlook Isn’t in Compatibility Mode Firstly, check that you have chosen the Run this program in compatibility mode option for Outlook. You need to right-click on the Outlook symbol given on the screen. Otherwise, go to the File Explorer menu for choosing the Properties option. Choose the Compatibility option. You need to unselect the Run this program in compatibility mode tab. Click on the Apply button. Press on the OK option to close the menu. Updating the Outlook Press on the File menu. Click on the Office account op...