Here is a validation list to help resolve issues when failing to login and connect with Azure SQL in Remote Desktop Manager.
Was the user added/created in Remote Desktop Manager?
Is the spelling of the username in Azure and Remote Desktop Manager the same?
Is the spelling of the database name in Azure and Remote Desktop Manager the same?
Compare the data source configuration with one that works from another user in File – Data Sources.
If it still fails, Export and Import the data source configuration (.rdd) from the working user.
Ask the user from whom it works to launch a connection with his credentials. Doing so will confirm a connection can be made to the Azure database from this instance of Remote Desktop Manager.
If it does work, change the credentials in Remote Desktop Manager with the ones of the initial failing user and retest with these credentials.
If it does not, install SSMS and try to connect with the same failing user and authentication method to validate a connection can be made to the Azure database.
If all fails, contact our customer support team.:::