External user cannot open shared link
External sharing has levels per site and tenant. Both have to allow it or the link breaks.
Try this first
- 1Confirm site-level sharing matches or is looser than tenant
- 2Inspect the link type: anyone, specific people or company-only
- 3Ask IT if the target domain is on a block list
- 4Test with a colleague via a guest account
When to bring us in
If sharing level looks right but the link keeps returning 403.
See also
- Outlook crashes or freezes on large attachmentsUsually the mailbox cache is the culprit, not Outlook itself. Shrinking or relocating usually helps within ten minutes.
- Teams: they cannot hear me, or I hear nothingIn our experience Teams usually picked the wrong audio device after a Windows update or a new headset.
- OneDrive has stopped syncingThe cloud icon is grey or has a warning. Locally changed files are not showing up for colleagues.
None of the above fits?
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