# Ignition edge 7.9 - Siemens S7-1500 certificate

**URL:** <https://forum.inductiveautomation.com/t/ignition-edge-7-9-siemens-s7-1500-certificate/104133>\
**Category:** Ignition\
**Created:** [March 25, 2025, 7:17am UTC](https://forum.inductiveautomation.com/t/ignition-edge-7-9-siemens-s7-1500-certificate/104133 "2025-03-25T07:17:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Godri\_Marton](https://avatars.discourse-cdn.com/v4/letter/g/9e8a1a/32.png) [@Godri\_Marton](https://forum.inductiveautomation.com/u/Godri_Marton)\
**Post date:** [March 25, 2025, 7:17am UTC](https://forum.inductiveautomation.com/t/ignition-edge-7-9-siemens-s7-1500-certificate/104133/1 "2025-03-25T07:17:15Z")

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Hello, I have an Ignition 7.9.5 production server and I want to connect to a Siemens S7 1500 Opc-ua server and I get the following error: UaException: status=Bad\_CertificateUseNotAllowed, message=The Certificate may not be used for the requested operation. How can I fix it? The certificate is self signed, I attach it.  
Thanks  
[PLC-1OPCUA-1-6SELF\_X.509 Certificate\_6.der](https://forum.inductiveautomation.com/uploads/short-url/apWztwOpwJGyfxu1mGYY9FOxqcM.der) (1.0 KB)