We are working on an Outlook add-in (Office 365) that works fine on all clients (desktop, different browsers) except for Safari on a Mac. On Safari our own custom login system does not properly save it's session when navigating between pages in the add-in. It works fine when we view the add-in outside of the Outlook host. Something in the Outlook host must be interfering with maybe the cookies that are saved by our login system. However, if that were true you would expect this to happen on all browsers, not just Safari.
Has anyone experienced the same?