Install sqljdbc_auth.dll to use windows authentication in SQL Server:
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1. Copy sqljdbc_auth.dll from the zip archive to these folders (for 32-bit Zagreus use x86 version):
c:\Programme\zagreus\server\service\lib\
c:\Programme\zagreus\worker-controller\worker\lib\sql\        (note: the folder "sql" has to be created!)

2. Add this line to worker.properties:
worker.javaoptions.7=-Djava.library.path="lib/sql"

3. Restart Zagreus