Outlook 365 issues

When installing Outlook 365 on a computer that previously had Outlook 2010, the following error can occur:

MAPISendMail: Failed to submit message. Attachments to the message exceeded the size limit set by your Administrator.

To fix,delete the following registry key:

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Preferences\MaximumAttachmentSize