Rooms appointments not showing in Outlook Calendar

Dear Experts,

I have a strange problem that I cannot figure out.  One of my users cannot see the "busy" sections of room calendars.
Other users are able to see them, but not this user, however, if she logs into OWA, the items in room calendars are visible.
I thought that this was Outlook issue, and performed a clean install on another PC, then installed MS Office 2010, installed all of Windows Updates that were available.
When this user logged in, the Outlook behaves the same exact way.  There are some other users' calendar items that she cannot see, either.  Some users' calendar items show up fine.
Since she is an administrative assistant, it is critical that she sees everyone's calendar.  I even gave her full permission for one person's calendar to her, had this person reinvite to share calendar, but nothing works.
( other users can see everything fine, from what I tested. )

Please advise, this is making me crazy!
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Rolf HasselbuschIT-ConsultantCommented:
Hi yballan,

let the user log on to a computer were Outlook is installed
Create a shortcut to outlook.exe
edit the shortcut and add /cleanfreebusy after outlook.exe, save the changes
run outlook via the created shortcut and wait a minute
start Outlook normally, all free busy information should be okay and visible again

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yballanAuthor Commented:
Thank you for an excellent advise!!1
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