Hello Paul Chou,
Welcome to Microsoft Q&A.
This error usually means Office cannot confirm its connection during an online repair, even if your internet is working. It is often caused by local settings rather than a Microsoft server issue. Here are some steps that typically resolve it:
1. Check your network setup
Temporarily turn off any VPN, proxy, or firewall and try the online repair again.
2. Enable TLS 1.2
Open Control Panel > Internet Options > Advanced. Scroll down and make sure “Use TLS 1.2” is selected.
3.Allow connected experiences in Office
Open any Office app, go to File > Account > Manage Settings, and enable optional connected experiences.
4. Run the Microsoft Support and Recovery Assistant (SaRA)
Download it here: https://aka.ms/SaRASetup. It can detect and fix common repair issues.
5. Try Quick Repair first
If Quick Repair works, retry Online Repair after making the changes above.
---If none of these steps work, it could be a temporary Microsoft service issue. Waiting a few hours and trying again often resolves it.
Let me know if you have any other questions.
Best regards,
Thomas
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