Consider the following scenario:
- You sign in to Microsoft Office Communicator 2007 R2 on a computer that has a version of Internet Explorer later than Internet Explorer 7 installed.
- You start an instance message (IM) conversion with another user.
- You try to send a file to the user.
This issue occurs because a flag of the ActiveX control of Office Communicator 2007 R2 is not set. Therefore, Internet Explorer resets the size of the file transfer progress bar.