TDAD comes with two installation files. One "Integrated" and one "Standalone".
These are in reference to their SEPM Integration. If the SEPM tab is missing, then the "Integrated" installation Package was not installed.
Example:
Installer_3.3.1.0_Integrated.exe
Installer_3.3.1.0_Standalone.exe
Log into mysymantec.com and download the installation package with "Integrated" in the name.
you will need to reinstall with this installation package.