Feature Request Summary: 

Zendesk should support using pre-filled ticket forms when using SSO.

Description/Use Cases: 

Currently, if you're using SSO for customer login, you won't be able to use pre-filled ticket forms. The parameters are lost when the customer returns to Zendesk. See these posts for more info:

• https://support.zendesk.com/hc/en-us/articles/5547458416794-Pre-filled-ticket-fields-are-removed-after-logging-in-with-SSO
• https://support.zendesk.com/hc/en-us/community/posts/4703281675418-Pre-filling-ticket-forms-doesn-t-work-well-with-logged-out-users-and-SSO

Business impact of limitation or missing feature:

We use pre-filled ticket forms to help guide customers to use standardized form selections that allow us to easily prioritize, route, and report on specific issue types. Not being able to do so creates more manual work for agents to categorize and update these tickets as needed. It also creates more work for customers to have to fill in those fields manually that we could otherwise default for them.