Hi @LinVPowerBI1 ,
Sorry for that it seems that Power BI desktop doesn't support to fetch data from password protected Excel file.
Here is an idea you could click to vote it up.
As a workaround, you could remove passsword and instead, move the files to a secure folder that limited people have access to.
Community Support Team _ zhenbw
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.