> Source: [sk121473](https://support.checkpoint.com/results/sk/sk121473)

# sk121473 - Skype for Business does not work when HTTPS inspection is enabled and the Security Gateway is configured as a proxy

| Property | Value |
|----------|-------|
| Solution ID | sk121473 |
| Date Created | 2017-11-15 |
| Last Modified | 2019-08-19 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- Skype for Business does not work when HTTPS inspection is enabled and the Security Gateway is configured as a proxy.

## Cause

The Host header in a HTTP/1.1 request is presented in mixed case. This is is not limited only to Skype for Business.

The issue might occur in both non-transparent and transparent proxy implementations.

## Solution

This solution requires authentication. Please log in to view the full solution.

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