Hi @Yang Wanzhong ,
What type of attachment? ms-office related?
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Is there any error message? Please upload a screenshot for analysis.
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No error message. I uploaded the file on page and choose "Show as link". There is no reaction from confluence and nothing happen when I click the link.
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Try to use View File Macro
https://confluence.atlassian.com/doc/view-file-macro-170494360.html
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