| author | MandiOhlinger |
|---|---|
| ms.topic | include |
| ms.date | 02/09/2026 |
| ms.author | mandia |
Some Microsoft 365 services, such as Outlook, might not perform well using third party or partner VPNs. If you're using a third party or partner VPN, and experience a latency or performance issue, then remove the VPN.
If removing the VPN resolves the behavior, then you can:
- Work with the third party or partner VPN for possible resolutions. Microsoft doesn't provide technical support for third party or partner VPNs.
- Don't use a VPN with Outlook traffic.
- If you need to use a VPN, then use a split-tunnel VPN. And, allow the Outlook traffic to bypass the VPN.
For more information, go to: