Modify the registry To resolve Outlook 2013 attachment size limits

When using Outlook2013, send a message if the attachment size exceeds 20M, you will receive a warning that it cannot be sent, exceeding the attachment limit. In Outlook2010, this attachment limit is also available by default. Considering that I am not using Exchange mailboxes and are not affected by the policies of exchange, I try to modify them in the way that Outlook2010 improves:

[Hkey_current_usersoftwaremicrosoftoffice15.0outlookpreferences]

Add a new DWORD (32-bit) value under this item above:

"Maximumattachmentsize" =dword:00000000

After you add a new key value restart Outlook, send 50M attachment successfully!

Office 2013 X64 is also a new DWORD (32-bit), my machine built 64-bit invalid. Change it to 32.