SharePoint: Fix Broken HTML Page Links

Key insights

• HTML Field Security — SharePoint blocks navigation from rendered HTML pages to domains that are not approved, so links can appear but do nothing until the destination domain is allowed.
  
• Allow list — Ask a site administrator to open site settings, go to HTML Field Security, add the specific host domain to the allow list, save the change, then refresh the page to retest the link.
  
• Supported link types — Pages in the same site and tenant normally work; links to other tenants or external websites can work too, but the destination domain usually needs approval.
  
• Link markup — Check anchor tags for correct href values, include the scheme (https://), close quotes, and avoid JavaScript redirects; malformed or relative URLs can break navigation.
  
• Relative vs absolute URLs — Use absolute URLs for cross-site or external links and correct relative paths for internal links; approve the exact host instead of broad wildcards to limit risk.
  
• Permissions & tenant limits — Verify user access to the target content and test as an admin if a link fails after moving a page; cross-tenant links do not change tenant security or user permissions.
  

Keywords

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