Dear Deriv Community members,
Authorization failed or Invalid account error message is commonly seen when you have entered incorrect login information. This includes either an incorrect Deriv MT5 login ID, server, or password.
The error message of your MT5 will be shown in the journal section:
You may easily find your DMT5 account login information in the Deriv MT5 Dashboard by clicking here.
Click on the Open button to see your login information for the Deriv MT5 account
Also, If you are trying to log into your MT5 platform and receiving an error of “Authentication Failed” despite using the correct account number & password, it could be due to the server you are using to access the account.
Please refer below to the correct servers to use for the account you are trying to access;
MT5 mobile application:
Real MT5 Account Server
- Broker Code: Deriv.com Limited
- Server: Deriv-Server
Demo MT5 Account Server
- Broker Code: Deriv.com Limited
- Server: Deriv-Demo
If you don’t remember your Deriv MT5 password, don’t be alarmed, you can change it here and follow the guide to reset your password.
You would need to ensure that your Deriv MT5 account information is the same as your login in MetaTrader 5 application. Also, please make sure that you are connected to the access server.
If you would like to know how to reset/change your Deriv MT5 password, you may go ahead are refer to this post:
We hope this information serves as your guide when logging in to your Deriv MT5 account. 
If you have any questions, please visit our Help Centre or contact us via Live Chat and WhatsApp.