Signing failed with error 800B0003

[fairmonk]

I have a .bat file which fails to sign with the 800B0003 error.
Also this message is displayed:
"The file cannot be signed because it is not a recognized file type for signing or it is corrupt."
the content of the bat file is:

What can be done to resolve this error ? all the rest *.ps1 files that I have - are signed without problem.

[j-laemmermann]

It's not possible to sign a .bat file at all, because .bat files don't support signatures.
This "error" is not limited to AzureSignTool, but it's a known limitation of .bat files.