UI of Symantec Management Console is affected in several places after changes implemented by Microsoft in MS17-006: Security update for Internet Explorer: March 14, 2017.
According to our investigation problems are resolved after installation of another Microsoft update: https://support.microsoft.com/en-us/help/4016446/forms-in-dynamics-crm-2011-are-not-displayed-correctly-after-kb-401307
Corresponding KB article: TECH240105