I feel very stupid for asking this, but after over an hour of searching, I cannot find out how to use this client-supplied, two-column xls glossary in Trados. I must be missing something because such a simple operation cannot be this difficult. I am using Trados 2017.
I'm in the same situation, the Glossary Converter fails to recognize Multiterm in my system, so I cannot use it at the moment, and I'm back to using the regular Multiterm Convert + Multiterm procedure.
This is an old article, but the same procedure still applies today. I hope it helps.
Importing Excel Glossaries into Multiterm
Alternatively, if you'd like to use your Excel file directly as a glossary, try this app: appstore.sdl.com/.../