[Bug]: Server URL in the Desktop-Client is overwritten by SiteURL configured at server

[Profesor08]

Checks before filing an issue

• This issue doesn't reproduce on web browsers (such as in Chrome). If it does, issue reports go to the Mattermost Server repository.
• I have checked the issue tracker and have not found an issue that matches the one I'm filing. This should include closed issues.
• This issue is not a troubleshooting question. Troubleshooting questions go here: https://forum.mattermost.com/c/trouble-shoot/16.
• This issue is not a feature request. You can request features and make product suggestions here: https://mattermost.com/suggestions/.
• This issue reproduces on the most recent stable version, or the most recent prerelease version of the Mattermost Desktop App.
• I have read the contribution guidelines.

Mattermost Desktop Version

Desktop App Version 6.1.2

Operating System

Windows 11 x64

Mattermost Server Version

Server Version 11.4.1

Steps to reproduce

1. Open Edit Server dialog
2. Edit Server URL

Expected behavior

Server URL to not change to configured on server

Observed behavior

Server URL is changing to configured on server

Log Output

[2026-05-07 12:04:13.533] [error] Logger Log level set to: { level: 'info' }
[2026-05-07 12:04:13.729] [info]  [SentryHandler] Sentry initialized for error tracking { isPrerelease: false }
[2026-05-07 12:04:13.800] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2026-05-07 12:04:13.800] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2026-05-07 12:04:13.809] [info]  [SecureStorage] Secure storage initialized - encryption available
[2026-05-07 12:04:13.823] [info]  [SecureStorage] Initialized secure storage cache
[2026-05-07 12:04:13.861] [info]  [ServerDropdownView] init
[2026-05-07 12:04:13.931] [info]  [i18nManager] Set new language { locale: 'en' }
[2026-05-07 12:04:14.019] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2026-05-07 12:04:18.912] [info]  [UpdateNotifier] Checking for updates { manually: false }
[2026-05-07 12:04:18.912] [info]  [UpdateNotifier] Fetching update info from { url: 'https://releases.mattermost.com/desktop/latest.txt' }
[2026-05-07 12:04:19.391] [info]  [UpdateNotifier] Remote version found { remoteVersion: '6.1.2', currentVersion: '6.1.2' }
[2026-05-07 12:04:19.391] [info]  [UpdateNotifier] No update available { remoteVersion: '6.1.2', currentVersion: '6.1.2' }
[2026-05-07 12:04:31.106] [info]  [ModalView] [editServer] preloading with C:\Program Files\Mattermost\resources\app.asar\internalAPI.js

Additional Information

Server is located in one place, and allows to configure only one URL (main.example.com). Users has issues when they are located in various regions, with different restrictions. Configuring a few CDNs (local.example.com, eu.example.com, us.example.com), fixes this issues. Users can access mattermost from browser, and communicate fine. But desktop app, not accepting this urls, and overwrites it with url from server (main.example.com). The is only solution was found, is to modify hosts file 127.127.127.127 main.example.com, to make desktop app to work somehow, ignoring sertificate errors. But finally, app works fine.

[devinbinnie]

This is by design, as there are issues that come up when the configured URL does not match the Site URL, so we ensure that they match. However, maybe there's a case to be able to disable it for the specific case you're talking about, though we do not recommend that setup, since when connecting the application still uses the Site URL for a lot of navigation functionality, so results may be unexpected.