We have Exchange 2010 on Server 2008 R2. One user is using Mac Outlook 2011. When he tries to send attachments to some of our clients, the attachments do not show up. If he sends attachments to a Yahoo, MSN or Gmail account, they show fine.
If he sends attachments to the clients with OWA or Outlook 2010 on Windows, the attachments go through fine.
His OWA Sent folder shows all emails having attachments.
The file size is less than 100kb and all of his email's are going out in HTML.
Are there any additional client-side or server-side configurations we need to do to resolve this issue with attachments for Mac Outlook 2011?