@Flinx 

Hi, 
We don't recommend placing an indoor camera behind a window. If the camera is installed behind a window and monitors outside, infrared lights may cause reflection when the camera is in Night mode, resulting in blurry and unclear images, thereby hindering timely detection of moving objects. If the infrared lights are turned off at night, the camera's live view page may display a black page, which also affects the camera's ability to detect events.

If you want to monitor the outside area, an outdoor camera is recommended. You can refer to this link to find one that interests you.

Best Regards