If the menu termXact is not displayed in the menu bar, please check in the Control Panel => Programs => programs and features if the AddIn of termXact exists.
In case it doesn’t exist, the installation has failed. Then execute the installation again.
In case it is listed, please check the MS-Office AddIns. In the MS-Office programs it has to be listed as COM-AddIn under File =>Options =>AddIns.
If the Com-AddIn is missing there, please contact firstname.lastname@example.org