Start by finding your Challenge. Hover over Manage in the Top Navigation Bar, and then select Manage Challenges. This will take you to the Challenge Management page, which lets you search and filter for specific Challenges under your organization.
Find the Challenge that you would like to edit, and under its Manage dropdown, click Edit.
You are now on the 'Edit Challenge' page. This page functions nearly identically to the 'Create Challenge' page, in that it displays all of the information that you are able to edit, modify, and save.
Work your way through the form and edit the fields that you have access to. Please note for Pre-built redeemed Labs from the Marketplace, there is a limited number of fields you can modify.
Edits to consider:
Challenge Details
Status
Privacy
Publish or not publish
Eligibility requirements
Maximum # of submitted projects
Minimum # of imported badges
Minimum # of achievement trophies
Minimum Rank # requirement
Timeline
Restricted vs flexible days
Challenge deadline
Scheduled announcement
Achievement
Prize name, description, image
Pitch and Assessment
Default pitch template for project submission
Sponsors
Sponsor details and image
Agreement
Custom Challenge agreement
Labs
Labs and Lab Programs associated to this Challenge
Resources
Resources, Resource Collections and Resource Groups associated to this Challenge
Once you have finished editing your Challenge, scroll down to the bottom of the page and click the 'Update Challenge' button to save your changes.