> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/server/fr/knowledge-base/troubleshooting-articles/the-remote-server-returned-an-error-400-bad-request.md).

# The remote server returned an error (400) Bad Request

Vous obtenez le message d'erreur suivant lorsque vous tentez de vous authentifier sur l'instance Devolutions Server avec Remote Desktop Manager.

```
The remote server returned an error (400) Bad Request
```

### Solution

Il existe deux solutions différentes pour ce problème :

* Réduire le nombre de groupes AD dont le compte utilisateur fait partie. Nous sommes conscients que, la plupart du temps, en raison de la conception de la structure AD, il n'est pas possible de réduire le nombre de groupes AD.
* Augmenter les paramètres des entrées de registre ***MaxFieldLength*** et ***MaxRequestBytes*** sur le serveur. Veuillez consulter l'article Microsoft suivant pour obtenir plus d'informations sur la façon d'augmenter ces valeurs. <https://support.microsoft.com/en-us/help/2020943/http-400-bad-request-request-header-too-long-response-to-http-request>


---

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