Unable to open the Free/Busy Information

I am using SBS2003 with Exchange 2003 and Outlook 2003.  We have 3 staff members and all have shared their calendars.  Everyone is setup with Author permissions on each others calendar.  Everyones permissions are set to Create, Read, and Folder Visible.  They are allowed to edit and delete thier own items.  Two of our staff can edit each others calendars and mine.  I can view each staff persons calendar but can only add items to one of them.  When I click on the other users calendar to setup an appointment I get the message "Unable to open Free/Busy information".  I have tried removing myself from the list of people the calendar is shared with and adding myself again.  I've tried changing my permissions from author to editor, to publishing editor, etc.  I have tried changing the amount of Free/Busy information published for this user from 2 months to 6 months.  I've tried rebooting the server and all workstations.  It is critical that I be able to edit this users calendar from my workstation.  FYI I am a member of the domain admin group the others are members of the users group.  

TIA
Steve
scsandenAsked:
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Exchange_AdminCommented:
On these problem users, launch OUTLOOK.EXE /CLEANFREEBUSY
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bugs571Commented:
if this fails try the following switches outlook.exe /cleanfreebusy /cleanreminders, if that still does not work us the mdbview32 utility to access and remove the free busy info from the server
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AvonhunCommented:
i am having a similar problem to this.  when one of the users tries to input into a shared calander she gets the "Unable to open the Free/Busy Information" error.  when i run outlook.exe /cleanreminders it will work and she is able to input the calander entry but only once.  if she wants to input a new calander entry a second time, she has to rerun outlook.exe /cleanreminders.
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rpetzoldCommented:
I am having the same issue with a SBS2k3 system.  Calendar works fine on the client computer but when the people access his calendar through shared calendar it shows appointments but they can't add or edit to the calendar.
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Exchange_AdminCommented:
Maybe they do not have permissions to add or edit the calendar.
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rpetzoldCommented:
Hey Thanks for the answer but it wasn't related to permissions.  I took the easy way out.  I installed exchange SP1 as well as the rest of the package for SBS2k3.  After installing all the service packs on the server everything seems to be working great.  Thanks for the help.  If anyone else is experiencing this problem please download and install all the service packs for SBS2k3 first.
Thanks
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