The most common ticket ICT seem to get concerns staff not being able to manage where the sound on their computer plays.
With a plethora of options to choose from: headphones, monitor speakers, laptop or desktop speakers, telephone headsets - Windows lacks a neural connection to second guess where you want sound to be played.
Adding to this - the nature of plug n' play often resets the last known or default option if the device doesn't respond before other available options.
It is therefore vital that you know how to direct sound to where you want it played.
{Right Click the speaker icon and select Playback Devices}
{Choose the device you wish to use for Playback and click the set as default button}