Exchange Server Share

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How To: Open Shared Calendar in OWA

Sometime back I posted an article about how to “Give Calendar Read Permission on all Mailboxes” in your environment and anyone can open anybody’s calendar in Outlook easily if it is shared but how can anyone open in OWA? Let’s discuss the caveats in detail…

Let’s take an example, Sheldon Labrooy shared his calendar with me (Amit Tank) and I got a sharing invitation.


I can open his calendar by clicking on “Open this Calendar” button on top of the mail or with help of “Open a Shared Calendar”.


But there isn’t any option to open Sheldon Labrooy’s calendar in OWA.


If I try to open his mailbox in “Open Other Mailbox”,…


I got an error that you don’t have permission to open this mailbox.

Pretty clear, he has shared only Calendar folder of his mailbox but not Full Mailbox.


When we try to open somebody else’s mailbox in OWA, OWA main web page has all modules (Mailbox, Calendar, Tasks, Notes, other options etc) listed and Exchange tries to check full mailbox permission which we don’t have and get permission error.

Hummm, to open other’s mailbox in OWA we need to have explicit “Full Mailbox” permission on that mailbox, very well explained in below article.

How to Open Another User’s Calendar in Outlook Web Access

When user or admin shares a calendar, it gives “Reviewer” MAPI Folder permission on just Calendar folder.

So how do we open shared mailbox in OWA, what’s the hack?

Instead of opening main page of OWA why don’t we directly open just calendar module part, and here are the links to open just calendar in various views…

Views Links
Calendar View – Default – Daily https://<server name>/owa/<SMTP address>/?cmd=contents&module=calendar
Calendar View – Daily https://<server name>/owa/<SMTP address>/?cmd=contents&f=Calendar&view=Daily
Calendar View – Weekly https://<server name>/owa/<SMTP address>/?cmd=contents&f=Calendar&view=Weekly
Calendar View – Daily – Specific Date by specifying Date, Month and Year

https://<server name>/owa/<SMTP address>/?cmd=contents&f=Calendar&view=Daily&d=3&m=7&y=2009


y=[four digit year]

Let’s see all examples here…







Written by Amit Tank

June 15, 2009 at 1:09 pm

11 Responses

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  1. Hey Amit,

    Thanks for such a beautiful post ( explain in very simple way) , as it solve my calender sharing issue in OWA. Once again thnx a ton. Really Appreciate.
    God Bless you My dear Friend . (-:

    Thanks With Best Regards
    Manish S Solanki

    Manish Singh Solanki

    June 18, 2009 at 2:45 am

  2. […] back I discussed how to open shared calendar in OWA and user can use same method here to open “Inbox” of any read only […]

  3. How would I use this to access a shared calendar that isn’t the default calendar. I have one called ‘Shared Calendar’. I can’t seem to get access to this one. thanks.


    July 22, 2009 at 9:57 am

  4. your blog very well, it is very useful for me..


    July 25, 2009 at 10:44 pm

  5. Thank you for a well-written explanation of this issue. It is truly a shame that Microsoft cannot figure out how to integrate this capability into the existing version of OWA. You should be able to do this through the web interface, just like you can via the Outlook client.

    John Richardson

    November 20, 2009 at 11:04 pm

  6. IT’s just awesome. Like magic


    December 20, 2009 at 4:43 am

  7. can you please show how to see shared inbox in OWA


    February 18, 2010 at 11:08 pm

  8. great post! any idea what to specify in the link to use the “Light” mode, so the one that can open on FireFox?


    February 21, 2010 at 7:01 pm

  9. Awesome post. This will be a huge help at work. Thanks a million!!


    March 3, 2010 at 11:26 am

  10. THX! helped me a lot!


    June 4, 2010 at 9:19 pm

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