Full Access to Exchange Mailbox in Exchange 2010

I have noticed that sometimes when I give a user (eg User A) Full Access to another user's mailbox (User B), User B's mailbox AUTOMATICALLY appears in User A's Outlook. But sometimes it doesn't then I have to add it in manually.

How do I make sure that it does automatically appear. I have just granted 30 users full access to a mailbox but I don't want to visit every user to manually add the box nor confuse them with instructions for manually adding it. It would be better if the mailbox automatically appears for those 30 users
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MASEE Solution Guide - Technical Dept HeadCommented:
Are you running Exchnage2010SP3?  If you are running SP3 automatically it will appear in outlook.
Specially when you configure a new outlook profile full permission mailbox will appear automatic.
Scott CSenior EngineerCommented:
In addition to making sure you are on SP3, make sure you are on the latest Rollup Update.

it automatically adds the mailbox, you can just ask the user to wait for 30 minutes or ask them to restart the outlook after sometime.
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AmitIT ArchitectCommented:
That's called Auto mapping feature. By default it will be enabled, when you add permission and shows up in user outlook too. You can check via adsiedit, if it is enable or not.

Check this

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DonKwizoteAuthor Commented:
Thanks Everyone. All your comments helped.
DonKwizoteAuthor Commented:
Thank you
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