If you are comfortable with using the REST API to edit the json file ...
In the types section of your feature service, each type has a template section. When you change the attribute that controls the symbology, it will use the this template to set default values. Using the example json below, when your feature's symbol attribute is set to "SymbolValue", the template will set Atribute1 to use "SomeValue" and Attribute2 will be inherited because its value is null. If you want Attribute1 to be inherited, replace "SomeValue" (in line 20) with the word null (it will then look similar to line 21). You do not want to change "SymbolValue" (line 19 in the example) as it sets your symbology.
When working with the REST API, you should backup your feature service before making changes. Experiment with a test feature service to become familiar with the REST API. Use jsonlint.com to validate your json. I would also suggest that you only update the types section with the API.
{
"types": [{
"id": "SymbolValue",
"name": "SymbolAttribute",
"domains": {
"Attribute1": {
"type": "inherited"
},
"Attribute2": {
"type": "inherited"
}
},
"templates": [{
"name": "SymbolAttribute",
"description": "",
"drawingTool": "esriFeatureEditToolPoint",
"prototype": {
"attributes": {
"Symbol": "SymbolValue",
"Attribute1": "SomeValue",
"Attribute2": null
}
}
}]
}]
}
