You have a computer that has Microsoft Office Communicator 2007 R2 installed.
You are running an Office Communicator 2007 R2 client on the computer.
You put the operating system in hibernation or in standby.
In this scenario, you may experience an additional delay of 15 to 20 seconds. However, if the user first closes the Office Communicator 2007 R2 client and then puts the operating system in hibernation or in standby, it takes just several seconds.
To resolve this problem, install the following update rollup:
2028888 Description of the cumulative update package for Communicator 2007 R2: July 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.