I have a client that uses Office 2013 and Office 365 (hosted Exchange). When they go to use the scheduling assistant and add attendees, all the attendees come up with gray stripes across the day and if you hover over it you get an error stating "No information. No free/busy information could be retrieved. Your server location could not be determined. Contact your administrator".
Office 2013 is fully patched and it works correctly in OWA. Rebuilding the profiles does not resolve the issue.
Any insight would be greatly appreciated.