It's not currently possible to bulk unreject candidates within Greenhouse directly. However, you can accomplish this today by using the Harvest API to unreject the cohort of candidates in question, and then bulk reject them again with the correct/updated reason, either via this API method, or within the application itself.
Details on the Application Harvest API endpoint required can be found at: https://developers.greenhouse.io/harvest.html#post-unreject-application
Pro-Tip: You may want to choose not to notify candidates the second time they are rejected via email if you have already notified them once already.
Applies-To: [Greenhouse Recruiting]
Keywords: [ unrejection API reason ]