To send a Group SMS you simply start the application, select the group and the default messaging application is started with prepopulated receivers. You type your text and press Send. All your messages are stored in your Sent items folder. You can create, edit and assign members to the groups in the application. The groups are stored as Outlook categories and is synced with Outlook/myPhone/Exchange.Some Windows Mobile devices have a maximum limitation on number of receivers in text messages.