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I am using Outlook 2010, but I am unable to find a way to search through all the sub-folders of a shared mailbox. I believe this may be a limitation of the software, but I sincerely hope I am wrong.

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up vote 4 down vote accepted

Open the advanced find (Ctrl+Shift+F) and, using the browse option button, select the shared mailbox and then check the check box below Search subfolders.

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Do you happen to know if there's any particular reason why that wouldn't work? On mine "Search subfolders" is greyed out. – SilverbackNet Mar 7 '12 at 1:44
First though are restrictions applied in Exchange or on the Outlook installation, assuming you're in a work place. But I don't have first hand experience with that issue. – edusysadmin Mar 8 '12 at 1:11

This solved the problem for me.

Answer 1:

Check if the option to search 'All Mail Items' is enabled.

  1. Click inside the search window.
  2. Once done you would find 'Search Tools' tab appear in the ribbon.
  3. In the search tools tab, enable the option 'All Mail Items'.

Answer 2:

Disable the Download Shared Mailbox in the Advanced Settings of Outlook in Manage Cached Settings.

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Please don't just provide a link, copy and paste the relevant text from that link into your answer. – Tog Jan 10 '13 at 17:07

I had the same problem with outlook 2010, I could search sub-folders with my own account but if I tried to search sub-folders of a shared mailbox it was greyed out, this is what I did to fix it:

File -> Account Settings, choose your own account name
Click Change, More Settings, Advanced Tab, untick Download Shared Folders.

Restart Outlook.

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