When a firm colleague (e.g. the matter’s managing lawyer) shares a client with you as a Collaborator, court dates and matters on that client show up in your daily schedule and print bundle alongside your own, sorted by court and time. That is what the share is for: you could always open the file; now it turns up in front of you on the day.
When you open a shared client’s court date, the drawer shows an “Acting for [owner]” banner so you know whose file you’re working on. File the outcome the same way you would on your own files: mark it adjourned, enter the reason, etc. Acquit records that you attended and notifies the owner that an outcome has been filed.
The client’s timeline shows the action attributed to you, with the owner’s name preserved alongside, so there’s no ambiguity about who attended for whom.
Note: This is different from Town Agencies, which is for agency work by lawyers at other firms; intra-firm agency work uses sharing.