In perpetrating this attack, a hacker runs a list of common passwords against corporate email addresses both easily found through internet articles, corporate websites, social media, or numerous other more sinister sources. One common threat against Outlook Web deployments involves password-guessing or brute force attacks. Exposing not only your Exchange Server but also your corporate IT infrastructure to hackers attempting to access your systems via the OWA interface. Making Outlook Web (OWA) available reduces IT costs and encourages user productivity, but it also creates additional security risks. If Microsoft Exchange Server is your enterprise platform for email, you likely have also deployed Microsoft Exchange Outlook Web to enable employees to access email, calendars and contact information via mobile devices and web browsers.
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