Hi Exchange 2007 SP2 outlook 2007 For one user we are unable to see free busy info, when i check the calender properties its greyed out and there is nothing in permissions level. it gives some permissions cannot be displayed the client operation failed. I would like to add the default permissions back. Please advise Thanks AK

Use pfdavadmin, connect to the mailbox and set the default perms on the calendar.

is pfdavaadmin needs to be run from the user machine or it can be run from the server or any other machine. and please instruct how to reset to default perms on calendar

It can be run from any machine. I would run it from a workstation, not a server. http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=22427 Download it and read the doc that comes with it. When you connect to the server, choose mailboxes. Then access the mailbox , get the properties of the calendar and set the perms there. Its pretty straight forward. Make sure you have full permissions on that mailbox.