Hello @Frank Wiesemann,

Where and how are you currently entering the site IDs one by one? Can you provide us a few screenshoots?

Maybe it is possible via commands, but first I want to check how are you currently doing this task.

Thank you in advanced and regards.

Thanks for reaching out, here a screen shot:

This seems to show a way to add sites by checking boxes. https://dell.to/3olBRWB