Office 365 vs. Exchange 2010 calender sharing

Hi Experts,

We have 2 customers who wants to share a ressource (meeting room) between an Office 365 and an on-premise Exchange 2010.

They want to be able (on both sides) to read and write in the calender of the meeting room.

They don't share AD or anything else...

Any ideas if this is possible?
md_nemitsAsked:
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Vasil Michev (MVP)Connect With a Mentor Commented:
Just use the drop down menu on top to get the Exchange 2010 version :)

http://technet.microsoft.com/en-us/library/dd638083(v=exchg.141).aspx
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David CarrCommented:
Is it a hybrid deployment of Exchange?
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md_nemitsAuthor Commented:
Thanks Vasil - we use Exchange 2010 and not 2013 - but I guess its basically the same way to set it up :-)
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md_nemitsAuthor Commented:
@David:
Its not a hybrid solution - its 2 separate customers with 2 different installations (one in Office 365 and one in a local Exchange 2010).
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Adam BrownSr Solutions ArchitectCommented:
Yeah, you just need to make sure each side is set up with a connection to the MS Federated Gateway, http://technet.microsoft.com/en-us/library/dd298055%28v=exchg.141%29.aspx and its sub-pages have instructions for 2010. They're pretty similar for Office 365/2013, but you can get those instructions here: http://technet.microsoft.com/en-us/library/jj657462%28v=exchg.150%29.aspx
Office 365 may have this set up by default, so you may not need to do anything on that side. (Not 100% sure). Once that is done, you need to create a sharing policy and organizational trust between the two environments.

Now, the problem is that you probably aren't going to be able to modify the calendars unless you belong to the same organization as the calendar. You *might* be able to allow editing if you add write permissions to anonymous and/or default permissions on the calendar itself, but I haven't been able to test that yet.
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md_nemitsAuthor Commented:
Thanks abcbrown2010 - will look into it :-)
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