Hi,
Our environment is an Exchange 2010 SP3 RU7. A user received an email with hypertext links in it. From Outlook client everything works fine but fom OWA if they click on them you get a "this link has been disabled to protect your security" error message and the url is "owa/UrlBlockedError.aspx" .
After several searches it turns out that this problem was known under Exchange 2007 but corrected in 2010 or our infrastructure is already in 2010 but we undergo this problem. Also some blogs have discussed this issue but nothing convincing:
https://social.technet.microsoft.com/Forums/en-US/d966885b-0b57-4811-bbab-af8898c21141/this-link-has-been-disabled-to-protect-your-security?forum=exchange2010
http://social.technet.microsoft.com/Forums/en-US/exchangesvrclients/thread/b660069a-933a-4b89-9a24-ccc7b1a04d67
If someone has an idea?