Connecting to SQL Server using windows authentication is something that periodically crops up here on the forum!
If you haven’t found them already, may I suggest starting with the following threads and if you still haven’t managed to resolve it, come back and let us know, and we can try to work through the steps required.
Of course if you have already found those, then my apologies. Please post some screenshots of the config of your MS SQL Connector, including the jdbc parameters, and describe the steps you have taken so far as often it is something trivial that is missing or very slightly incorrect.
And lastly… the thing I should always ask… are you able to connect to SQL Server using WIndows Authentication outside of KNIME?