When the Active Roles MMC Console is open it is not possible to expand the Active Directory view to see the managed domain.
If LDAP over SSL is enabled in the domain, and there is an issue with the certificate. If the SSL Options for SSL Usage is set to Force Use instead of Use if available or Do not use. An Administrator user account will not be able to expand the the Active Directory tree to view the managed domains.
To correct this behavior replace the certificate being used for LDAP over SSL connections, or set the SSL Usage to Do not use, or Use if available instead of Force use as the below image shows.