To customize the Send/Receive group, open the Send/Receive ribbon, then click the Send/Receive Groups drop-down menu and click the Define Send/Receive groups item.
Outlook 2013 17 – Send-receive 1
Adventures in System Administration
To customize the Send/Receive group, open the Send/Receive ribbon, then click the Send/Receive Groups drop-down menu and click the Define Send/Receive groups item.