Artifact Signing: Account Suspension — Unable to Determine Reason and Reinstatement Steps

Problem description

I am seeking assistance regarding the suspension of my Trusted Signing - Preview account within the Artifact Signing service. The account's Public Trust identity validation shows a 'Suspended' status, and signing requests are failing with a 403 Forbidden error since November 1, 2026. I have received automated suspension emails on November 3 and 4, 2026, but these emails did not specify the reason for suspension. Additionally, the 'Renew' option is disabled in the portal, and the suspension seems to be related to a lack of action or verification, but no detailed reason or required documents are provided. I want to understand the specific cause of the suspension and the steps needed for review and reinstatement.

Environment

Product: Trusted Signing - Preview; Validation type involved: Public Trust identity validation; Region and subscription details are not specified in the case information.

What I've already tried

I reviewed the automated suspension emails received on November 3 and 4, 2026, and checked the status of the Public Trust identity validation in the portal, which shows 'Suspended.' I also verified that the 'Renew' option is disabled. I confirmed that signing was successful prior to November 1, 2026, and that all related emails are active and received the suspension notices. No manual support actions or further diagnostics have been performed beyond these checks.

Current status

I am seeking guidance on how to determine the exact reason for the account suspension, what documentation or information is needed for review, and the process to resolve the suspension and restore signing capabilities.