Incorporated product updates to pre-authentication secrets docs #8630
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fmartingr
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Jan 16, 2026
| From Mattermost server v10.12 and mobile v2.32, Mattermost deployments can use a reverse proxy to validate authentication secrets before allowing desktop and mobile requests to reach the Mattermost server. This adds an additional security layer by checking for the ``X-Mattermost-Preauth-Secret`` header. | ||
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| Pre-authentication secrets are only supported for mobile and desktop applications. Web browser clients don't support this feature. | ||
| Authentication secrets are only supported for mobile and desktop applications. Desktop automatically prompts users when a secret is required, while mobile users enter secrets in an Advanced Options section during server setup. Web browser clients don't support this feature. |
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This is somewhat true for mobile as well. In mobile, if you introduce the host and name, click connect, and the server returns the X-Reject-Reason as stated below, the mobile app will show the advanced options and the pre-auth secret field as required. Is not the same flow as the desktop version though.
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Newest code from mattermost has been published to preview environment for Git SHA 93d713a |
cwarnermm
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Jan 16, 2026
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Newest code from mattermost has been published to preview environment for Git SHA f5d7f00 |
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Newest code from mattermost has been published to preview environment for Git SHA 527e080 |
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