Background Information:
I'm currently working on integrating with the Millennium EHR API in the sandbox environment, and I'm encountering a persistent issue when calling the following endpoint: /20241001/groupInboxes
url: https://api.sandboxcernermillennium.com/{tenantID}/20241001/groupInboxes
Even when calling the endpoint without any query parameters, I consistently receive the following
{
 "code": 404,
 "message": "Not Found"
}
- 
Could it be that our sandbox environment lacks configured group inboxes, which causes the 404?
 
- 
Is this endpoint enabled and available in all sandbox tenants, or does it require a specific configuration?
Any guidance or clarification would be greatly appreciated so I can proceed with sending messages via the EHR Messages API (which, as I understand, requires valid group inbox IDs).
Thanks in advance!
Developer questions:
 
Are you an OPN Member?   No
Have you signed up to be in the Healthcare Developer Track?   No
Are you a registered Code Program member?   No
Does your App have a presence on the Oracle Healthcare App Marketplace?   No
Expected Result:
200
Actual Result:
404
Date/time of the example: 29 September 4:30pm PT