Your antivirus might be conflicting with the Outlook desktop app or Outlook.com and preventing you from attaching files to email in Outlook. You can check this by disabling your antivirus software ...

You can attach a folder to an email in Microsoft Outlook to send several files all at once. To attach a folder in Outlook, you'll need to compress it before adding it to your email draft.

From the Windows Explorer window that opens, select the file(s) you wish to attach and click "Open". We're using Outlook 2010 as ... On Apple's built-in Mail app, create a new email message ...

While using Outlook, users get a 20MB cap on the file size of their attachment, i.e., a user can only mail file(s) as big as 20MB in one email. This size limit has been seen even with the latest ...