Hi all I have set up a work Exchange account in Calendar. This Exchange account can receive and accept invites fine. However, when I create an event and then type in an email address in the 'invitees' section, the email address will not recognise as an email address and will disappear once I click 'done'. If I type an email address and then insert a comma, the email address will be highlighted in grey, but the same thing as above will happen. Ie you will only have an option to click 'done' and the invite will not send and will forget the address. Does anyone have any suggestions?