I have several users on IE11 and Office 2010 where the option under Actions for Open in Windows Explorer is suddenly missing. Connect to Outlook and Export to Spreadsheet are also missing. It is definitely their machine settings, because it works fine on other machines. Any suggestions would be appreciated.
Is it a 64bit browser? Does this help : http://community.office365.com/en-us/f/154/t/1415.aspx ?