FortiClient
FortiClient proactively defends against advanced attacks. Its tight integration with the Security Fabric enables policy-based automation to contain threats and control outbreaks. FortiClient is compatible with Fabric-Ready partners to further strengthen enterprises’ security posture.
mithing
Staff
Staff
Article Id 397383
Description This article describes what to check when the ACME certificate renewal fails with the error message 'A.C.M.E. Certificate renewal has failed. The client lacks sufficient authorization on FortiClient EMS.
Scope FortiClient EMS.
Solution

If getting the error message 'A.C.M.E. Certificate renew has failed. Client lacks sufficient authorization', The sample message is as follows:

 

Screenshot 2025-06-20 172522.png

 

To resolve the ACME certificate renewal failure on FortiClient/EMS, check the following items:

  1. Verify that there are no geo-blocks on the virtual IP that resolve to FortiClient EMS FQDN on ports 443 and 80.
  2. If the issue persists, temporarily disable the 'SSL inspection' profile in policy and check the traffic log in real-time in the FortiGate to see what the FortiClient EMS server IP is trying to connect to. 
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