Mimecast Personal Portal: Logging In Daniel Edgerton March 11, 2021 18:43 Navigate to the following URL: https://login.mimecast.com Enter your "Email Address" in the logon screen. Click on the "Next" button. In the "Password" field, enter the password that has been provided by your Administrator.If your administrator has chosen to use a Single Sign-On technology you will be redirectedto the sign in page of the identity provider. Select "Login". Comments 0 comments Article is closed for comments.