XLSX Attachments in Outlook - Microsoft Community


have windows 10 , every time open xlsx attachment asks default app (the other type of attachments don't have issue). checked remember app , have correct default app in windows settings. how can fix this?

hi roberto,

xlsx files opened using excel applications. regarding concern, possible excel app not set default app xlsx file. recommend download attachment on computer, launch excel app. there, please check if can able open xlsx file. validate if file corrupted or may give error message when opening file.

meanwhile, suggest check default apps file type on computer performing following steps:

  1. go settings.
  2. choose system.
  3. select default apps.
  4. click "choose default apps file type" on bottom of page.
  5. locate .xlsx file type , see if default app under excel app.

let know if need further assistance.



Office / Outlook / Windows 10 / Office 2016



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