Microsoft.Mashup.Client.Windows.dll
Library on Windows
Is it the real Microsoft.Mashup.Client.Windows.dll?
Installed in
C:\Program Files (x86)\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\From the file’s version info, as recorded by xCyclopedia (MIT). A copy in another folder, signed by someone else or with another hash is not necessarily malicious, but it is worth a closer look.