
2igoe (2igoe) asked a question.
Hello, I have a new custom attribute (string) introduced in the provisioning of an app as one of the Group Assignment attributes. There are 1000+ groups that need to be updated with a value on this new attribute (which is now empty). Is there a way I can bulk update the value for all the groups?

Thank you for contacting Okta support.
This is possible with a custom script that will run for all the groups that you have assigned to the app (please note that Okta Support does not provide or handle scripts) and use this API call: PUT /api/v1/apps/${applicationId}/groups/${groupId} and on the body request to have the custom attribute populated with a value that you want to update.
https://developer.okta.com/docs/reference/api/apps/#assign-group-to-application
Please also check this devforum post as it explains how to do this API call: https://devforum.okta.com/t/how-to-update-users-and-how-to-modify-custom-attribute-values-for-groups-with-the-okta-api/2158/3
Unfortunately is not possible to update this attribute for multi-select data type.
You can submit a feature request here https://support.okta.com/help/s/article/Okta-Ideas-Overview-FAQ?language=en_US
For any other questions you can always open a new ticket on Okta platform.