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As a part of UA security mechanism, UA server and UA client transfer their own certificate to other side when a client wants to connect to server.
In both sides, certificates should be marked as TRUSTED.
Step 1: Client wants to connect to a UA server
Here, client is Gelecek OPC UA Connector or Gelecek OPC Client Components.
Server certificate approval form appears on client side. You need to approve that this certificate is to be TRUSTED or REJECTED.
Click Trusted to make connection.
You will see error message on client side:
You will see on server side that cetificate of client is Rejected:
Now you need to mark certificate of client as Trusted:
Step 2:Client tries to connect again
This should be a successful connection.
Location of certificate file
On client side certificates of servers are here: