Hello DocuSign Support, We have completed the Go Live process successfully and are now in production, but every OAuth token exchange request is failing with the following error:

Hello DocuSign Support,

We have completed the Go Live process successfully and are now in production, but every OAuth token exchange request is failing with the following error:

  "error": "invalid_grant"
  "error_description": "unauthorized_client"

This has been confirmed via direct Postman testing with a correct request structure. Our technical team has ruled out all client-side configuration issues. We believe the root cause is that API access entitlement is not active on our production account. On our current IAM Starter plan, API access is listed as "Contact sales."

We need the following resolved as quickly as possible:

1. Confirm whether API access can be activated on our current IAM Starter plan or whether an upgrade is required.

2. Provide pricing for the appropriate plan that includes full production OAuth token issuance.

3. Activate API entitlement on production account ID 2********* immediately.

This is blocking a live production business workflow for our client and every hour of delay has direct operational impact. Please treat this as high priority.

Account ID: 2*********
Issue confirmed via: Postman (direct API testing)
Error: invalid_grant / unauthorized_client on all OAuth token exchange requests
Go Live status: Completed

Please advise on next steps and expected resolution timeline.

Thank you.