Hi @梶村 拓海
From the view of Office, Microsoft is constantly improving the security of using VBA in Office, and changing the default behavior of Office applications to block macros in files from the internet. For more, please refer to 'Macros from the internet are blocked by default in Office'.
From this article, using 'Save as' is not listed as steps to take to allow VBA macros to run in files that you trust. In my opinion, this action cannot remove the mark of Web from a file or let Office trust it that downloaded from Internet.
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