My organization has 4 divisions in 3 physical locations. We have 4 domains, 2 of which are on internal Exchange 2010 servers, and the other 2 are on Exchange 365. My mandate is to have all 4 organizations be able to share Free/Busy calendar schedules and GAL/OAB.
I've followed this technet article LINK
, and while I think I'm following the article and sub-articles I've also been in touch with Microsoft directly, and the tech has told me I need to have Hybrid Configuration set up to do this between 2010 and 365.
Can someone help me sort through this?