> Source: [sk172045](https://support.checkpoint.com/results/sk/sk172045)

# sk172045 - Microsoft Teams does not work with HTTPS Inspection on a 1400 appliance

| Property | Value |
|----------|-------|
| Solution ID | sk172045 |
| Date Created | 2021-02-15 |
| Last Modified | 2021-02-17 |
| Technical Level | Advanced |
| Products | Security Gateway, Spark Firewall (Locally Managed) |
| Versions | R82.10, R82, R81.20, R82.00.X, R81.10.X |

## Symptoms

- * The user cannot join a conference call in Microsoft Teams when HTTPS Inspection is enabled.
* The user cannot join a conference call in Microsoft Teams with HTTPS bypass by category.
* Creating an HTTPS Inspection Bypass rule by IP resolves the issue. <br />

## Cause

There are limitations in versions before R77.30 regarding cipher suites. The required cipher suites for Microsoft Teams are not enabled by default.  

Refer to [sk104562](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk104562) for the limitations.

<br />

## Solution

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

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