I deleted OfficeC2RClient.exe and cant undo what I did. How do I get it back?

[Microsoft Windows]

I tried to install Microsoft office from a product key but was struggling to install it as it kept asking for existing office files to be deleted or something like that. Anyway, I deleted some files including OfficeC2RClient.exe not realising what it was (big mistake). how do I get it back?

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