Vivek Komarla Bhaskar Thanks for posting your question in Microsoft Q&A. The above highlighted values are outside the range of Int32.MaxValue. So, you can try changing it to Int64 instead of int in your policy expression like below:
string value = "2147908970";
Int64 numericValue;
bool isNumber = Int64.TryParse(value, out numericValue);
return numericValue;
I hope this helps and let me know if any questions.
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