@SrMartin 

Hello,  
Thank you for your support of our cameras. For your questions:

1. Usually, the motion detection/tracking feature of the camera still works when putting it inside but pointing out through double glazing. However, if there is 1) light shining directly into the camera lens, such as sunlight  2) the glazing reflecting light to the camera 3) the glazing is not clean, it may affect the features of the camera.

2. The Tapo Cam does not support the "auto-focus" feature if it means that the camera changes the focal length physically to see things further or closer. Our Tapo Cams use digital zoom, which is also commonly used on other security cameras.

3. The Tapo C210 has the 850 nm IR LED with up to 30ft night vision range, and the night vision still works when putting the camera inside but pointing out through double glazing. However, if there is 1) light shining directly into the camera lens  2) the glazing reflecting light to the camera 3) the glazing is not clean, it may affect the features of the camera.
Note: The IR LED of the camera will be on when the camera is working in the night mode, and if the glazing reflects light to the camera, it may affect the camera working.
 
You will need to do some tests with the camera to find a good position and angle to place it.

Best Regards