We are aware of an issue that is affecting webmail in our hosted email environment.
Posted on 08/03/2016 2:29 PM EDT
Webmail users have been experiencing short 5-10 minute authentication and/or attachment accessibility issues. These issues are caused by poor performance within our authentication infrastructure. Our engineering team has isolated the problem and are working toward a resolution.
The exact cause is still under investigation. During this time, affected users will experience the inability to log in to webmail or access attachments within webmail.