Site boundaries are important

If you are in a single AD and you have multiple domains with SMS servers it is important for you to keep your boundaries out of other SMS servers. Configuring boundaries wrong can place computers in someone elses boundary or pull computers in. A adverse side affect of placing your boundary to the whole AD or not placing any boundaries at call can make your site the central site over all other sites. This will effictively disable all sms clients in the entire AD. Since they will consider their central/primary site as a proxy and will look to the "new" central site. Since computers cannot be controlled by that new site they will just sit in limbo until the site boundaries are fixed. A check of the Location Services.log file will confirm if boundaries are messed up for that client.