Hi @Senneville, Danielle (Horne-CCR - CA) ,
Yes, lookup columns cannot be displayed in conditionnal formating.
To achieve the desired conditional formatting, you can use the following JSON formatting example for the ETA column:
{
"$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
"elmType": "div",
"txtContent": "[$Permits_x003a_Permit_x0020_Expir.lookupValue]",
"style": {
"background-color": "=if(Date([$Permits_x003a_Permit_x0020_Expir.lookupValue]) - @now <= 5184000000, '#ff0000', if((Date([$Permits_x003a_Permit_x0020_Expir.lookupValue]) - @now <= 7776000000) && (Date([$Permits_x003a_Permit_x0020_Expir.lookupValue]) - @now >= 5184000000), '#ffff00', '#00ff00'))"
}
}
Note: Make sure you are using correct internal name of your extended lookup date column.
Result:
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