Websphere resource adapter,custom properties non editable

Installed Resource Adapter (a custom resource adapter) externally on Websphere 7

Opened Resource Adapter custom properties, image below

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Trying to edit host property

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But the field is not editable. Any reason why? I need to modify these properties through console.

Solution

I found a solution. Instead of editing custom properties of resource adapter. I opened the custom properties of J2C connection factory associated with the adapter and from there I could modify the properties and that works for me.

Screenshot enter image description here