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Open Microsoft Teams
Navigate to your class Team
Click ‘Assignments’ on the left-hand panel
Press the cog icon in the top right corner
Turn on the setting ‘New students will receive assignments created before they join the class’
If a new student has been added but this setting has not yet been turned on:
Navigate to the class and select Assignments.
Pick the assignment in your list or search for it by keyword in the command box.
Select the More icon ... > Edit.
Navigate to the Assign to field and choose the option for Individual students.