How to open attachments without always asking in outlook

When we double click an attachment in the Attachment Bar to open this attachment in Outlook, it always pops up the Opening Mail Attachment dialog box as below screenshot shown. And the Always ask before opening this type of file option in the dialog box is gray and invalid. Therefore, how could you open attachments without asking in Outlook? Below solution will help you fix it.

How to open attachments without always asking in outlook
attachment always asking