Azure Synapse database: How to fix HY000 "login failed" error

Question

I'm getting an error when using my Python program to connect to an Azure Synapse MS SQL server.

My info:

1. Using Python 3.11 on Windows 10 Pro. And using the pyodbc 5.1.0 module.
2. Server: [blahserver.sql.azuresynapse.net]. This is an Azure Synapse MS SQL server. I do not have admin access to this server but I can use it via Power BI just fine using my Active Directory login info.
3. Port: 1433
4. This is my first time using the server via Python. I connect to this SQL server fine in Power BI.
5. We use an Active Directory for login info.
6. Connection string: DRIVER={ODBC Driver 18 for SQL Server};[SERVER=blahserver.sql.azuresynapse.net][;DATABASE=mydbname;UID=myser@email.com];PWD=mypwd

I installed the MS ODBC driver on my laptop. And installed pyodbc for my program in Test\piecework. When my Python program tries to connect to the database on Azure I get this error:

• pyodbc.Error: ('HY000', '[HY000] [Microsoft][ODBC Driver 18 for SQL Server][SQL Server]Cannot open server "[xxx.com]" requested by the login. The login failed. (40532) (SQLDriverConnect); [HY000] [Microsoft][ODBC Driver 18 for SQL Server][SQL Server]Cannot open server "[xxx.com]" requested by the login. The login failed. (40532)')

But xxx.com is not any part of my server name.