Outlook 2010 Prompts "The attachment size exceeds the allowable range" How to Troubleshoot

When you send an attachment with Outlook 2010 today, you will be prompted to add attachments larger than 20M to indicate that the attachment size exceeds the allowed range. This is indeed a bug found at the Microsoft website, and the solution is as follows:

1. Copy the following content into Notepad:

Windows Registry Editor Version 5.00

[Hkey_current_user\software\microsoft\office\14.0\outlook\preferences]

"Maximumattachmentsize" =dword:00000000

2. Rename the file suffix named. reg, and double-click Import;

3. Restart Outlook 2010.