How do I amend activity dates?

Select the "Activity Management" tab on the left Navigation menu.
Use the search bar to locate the desired activity you would like to change the Assignment Details for.
Select k the "Registrations" sub menu and select any user whose Assignment Details you would like to update.
With all desired user's selected, select the "Edit Dates" button on the top right of the screen.
Input the new assignment dates you wish to use for these users, Select 'Update'.

If you want to send a message to users, you can enable and customise the message by selecting the "Send Message" toggle seen below. This is off by default.
You will now be able to see the new dates for the users on the Registrations table

After reading this article, you'll be able to change Assignment Dates, Completion Dates and End Dates for users assigned to activities!