
Dear @Andy ,
Thank you for your post in our forum.
You could use Office Online Server(OOS) to open office files from SharePoint in your browser.
OOS Overview: https://learn.microsoft.com/en-us/officeonlineserver/office-online-server-overview
OOS Deployment: https://learn.microsoft.com/en-us/officeonlineserver/deploy-office-online-server
Yours sincerely,
Renjie Sun
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