Fix: You Cannot Close Microsoft Word Until the Send Mail Command
If you are trying to send an email in Microsoft Outlook with a Microsoft Word attachment, you may receive the following error.
You cannot close Microsoft Word until the Send Mail command is finished. Switch to the New Message first, and either send or close the message.
If you try to quit or exit Microsoft Word before sending your email with the Word document attachment, you will receive this error. To send your email, ensure Microsoft Word is still open in the background.