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The Host that you will use in the Host Field depends on the OS version that the office is currently running.
If you are using OS El Capitan (10.11.x) or earlier, you can use the host clientftp.tsico.com.
If you are using OS Sierra (10.12.x), you will need to change the Host name to clientftp2.tsico.com.
If you are using OS High Sierra (10.13.x) and up, you can use the host clientftp.tsico.com
For more information on using Transworld to submit collections, see the Collections Manager documentation.