When trying to access a shared clendar in Exchange Online from Outlook 2013 it is very slow to open / create items. We have tried numerous things to improve performance without luck, eg.
check anti virus isn't causing problems
turning off hardware accelaration
turn off caching for shared folders
We have discovered today that during the wait for an item to load (which can take in excess of 20 seconds) if we perform a "Reconnect" from the "Connection Status" option of the systray icon then the item will open as soon as the reconnect occurs.
Can anybody advise what we can do to improve performance?