Microsoft Dynamics 365
Week Numbers can be enabled for use in other calendar selections, but it does not work on the Schedule Board calendar selection.
Also the Week Number user configuration only works if it has also been set in the system level admin settings as well. This is surely an error.
Universal Resource Scheduling
Weeks as a configuration capability would be good, a setting on/off (system wide or personal setting). As to displaying the correct week, it should use the Dynamics 365 System - System setting | Format | Date for which model to use as to how to calculate week number.
Or at least that used to be the case in Outlook, now you just enable it. Maybe ISO Week Number should do it: http://www.proesite.com/timex/wkcalc.htm
As week numbers are calculated differently in different countries, this should be based on either a chosen culture of the person looking a the scheduling board or a system setting which can be similar to the setting that exists in Outlook for enabling week numbers.