Excel created by bot not accepted by portals

I am utilizing a bot to produce an Excel file containing employee details such as Name and DOB etc. However, when I attempt to upload the Excel file created by the bot to a portal, the portal rejects it. Interestingly, if I manually create the same file and upload it, the portal accepts it. Both the bot-generated and manually generated Excel files appear identical, with the same fields. It remains unclear how the portal distinguishes between the two, and I am seeking a way to replicate the exact manual file creation process to ensure acceptance by the portal.

Can you share bot the excel files if possible?

the files are actually confidential. as i mentioned both the files are same it not even complex files basic fields no macro involved.

Is there anyway the excel flags the file is created by bot

I don’t think so…is it showing any error message in the portal…Can you check the type of the fields …if they are same

Yes datatype of fields are same in both files