How to extract one data from a mhl file and search this data in an excel file?

Hi @aisharpa,
I think you can open .mhl file using read text activity and output will be string then you can manipulate String - can find manipulation examples in below link - then you can read excel sheet and output will be data table and you can search in datatable using also way in below link.

1- String Manipulation:

2- Search Data Table: