German phrase
Bis wann möchten Sie ~ treffen?
Meaning
By when would you like to meet ___
When to use it
Asks about a meeting deadline. It is polite and useful in business conversations.
Example dialogue
Bis wann möchten Sie Herrn Müller treffen?
By when would you like to meet Mr. Müller?
Am liebsten noch diese Woche.
Preferably sometime this week.