It can be difficult and sometimes impossible to arrange for group photoshoots. The foreign team members may be only available for a day or two due to their schedule. In such situations, the photographer can photograph the group and the affected individuals separately.
To ensure that the image looks as realistic as possible, the lighting setup, lens focal length and angle used for the missing individuals needs to be similar to that of the rest of the team. As such, the photoshoot should be done by a professional.
The photographer can also use compositing techniques to fix the sky should the weather be unfavourable.
Composite photography takes a tremendous amount of work and should only be used for group portraits like this if there is no other solution or offers some unique benefit.