Log into the cloud portal and click on the Remote Desktop link:

Click on Connect:

This uses the same login as the cloud. Make sure the username is in SedonaASP\Company.User or Company.User@SedonaASP.com format as the domain is required.
Navigate to Start > All Programs > SedonaOffice > SedonaSync > Event Manager:

The default login is Admin, with no password, so click OK to open the SedonaSync Event Manager.