I've managed to create a calendar overlay to present a domain user's calendar in SP 2013 but all appointments are showing as Busy/Out of Office/Tentative etc.
I have followed the blog posts below and the calendar already has the show Full Details selected.
Is there anything else I could check please? I have given the domain 'Everyone' group Read access to the shared mailbox as it's not sensitive but it still hasn't changed the calendar entries.
Any help is appreciated thank you