Outlook 98 - Meeting request

In Outlook 98, I schedule attendee's, date and time for a meeting request. I then check attendee availibility tab and see that centain attendees have continuous backslashs (ie "\\\\\\...\\\") throughout all the hours\days\months in their attendee availibility calandar. Not sure what this means ?

We use Exchange 5.5. Their exchange accounts are located on another Exchange 5.5 server.

Thanks,

H. Gist