> Source: [sk98215](https://support.checkpoint.com/results/sk/sk98215)

# sk98215 - "Error: Access Denied. The format or content of your request has been detected as invalid or unsafe (400)" when accessing Outlook Web Access (OWA) through Mobile Access Portal

| Property | Value |
|----------|-------|
| Solution ID | sk98215 |
| Date Created | 2014-01-16 |
| Last Modified | 2020-11-02 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- "`Error: Access Denied. The format or content of your request has been detected as invalid or unsafe (400)`" when accessing Outlook Web Access (OWA) through Mobile Access Portal.

## Cause

When running two or more applications on the Exchange Server, each with a different authentication method (for example, OWA with Web-Form and Business Mail with NTLM), the authentication method of the first application accessed (if such exists) is used for accessing both applications. Therefore, the second application will return "Error 400".

## Solution

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

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