This article will help you if when installing Microsoft Exchange Server 2007 Service Pack 2 you receive a message like below:
Exchange 2007 SP2 setup cannot continue with the upgrade because the beremote has open files
Basically this is because another service or application is connected to your exchange server, for us it was caused by the Backup Exec Remote Agent. To solve the problem simple stop the service. If you have the Backup Exec Remote Agent installed then the service is called ‘Backup Exec Remote Agent for Windows Servers’