You must have "Full Access" or "Limited Access - HQ Tools" permission to send a message to a group.
NOTE: You must create a group before you can send a message to a group.
Sign in to "SportsEngine HQ."
Once in "SportsEngine HQ," click on the Members tab, then choose Directory.
Choose the Groups sub-tab.
Click on the "name" of the group you want to message.
In the top-right corner, click Message.
Input your message and click Send.