Exchange Information Store does not start

This morning I check that my Exchange Server 2007 was not working. When I check the event viewer I see the following error message:

Unable to initialize the Microsoft Exchange Information Store service because the clocks on the client and on the server machine are skewed

It means that the clock of Exchange Server computer is different of AD. Because of this, some services cannot work properly.

In order to resolve this, I just put this command on Prompt

Net time \\ADServerName /Set
Then, I restarted the Microsoft Exchange Active Directory Topology Service