A Security Update has been released for Outlook 2013. It provides “enhanced security as a defense in depth measure” as described in ADV180026 and is not related to a known security vulnerability. This update also contains additional fixes for 2 non-security issues.
- In some cases, the message body of an attached email message is not displayed correctly. For example, after you apply the update KB 4011078, the content in the message body of the attached email message becomes plain text when Outlook 2013 is configured for Exchange online.
- When the message body of an email message includes a text line that begins with a space and exceeds 988 octets, Outlook fails to upload the message to the IMAP server.