Then yes you can if you don't have your own time server but the MSS will of course need to have internet access. And the MAS will sync off of the MSS.
To administer an NTP server:
On the Administer Linux Date and Time page, select the NTP Time Server radio button.
In the NTP Time Server field, enter the Fully qualified Domain Name or IP address of the NTP server.
Note: If the system uses a Windows Domain Controller on the corporate LAN, that server can also be used as the NTP server.
Click Add NTP Server.
Click Save.
Verify that the system confirms the change occurred successfully.
If the change occurred successfully, the system logs a message in the Server Events log about the changes. The system does not reset to the new date and time until the system is restarted.
Stop and then start the messaging software. See Stopping the messaging software and Starting the messaging software for more information
Ken Means
"I find that the harder I work, the more luck I seem to have."
- Thomas Jefferson (1743-1826)