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Windows 7: Messages Stuck In Outbox (Non-Cached Mode + Delegated Mailbox)

09 Feb 2012   #1

Windows 7 Ultimate x64
Messages Stuck In Outbox (Non-Cached Mode + Delegated Mailbox)

If a user has their Outlook profile set to NOT use Cached Exchange Mode, and attempts to send an email from a mailbox they've been delegated access to, the message ends up "stuck" (for a lack of a better term) in the user's own Outbox and never leaves the Outbox, or moves to the Sent folder.

We are running Exchange 2010 SP2 on site, and our clients are connecting to Exchange via Outlook 2010 SP1.

My System SpecsSystem Spec
09 Feb 2012   #2

Windows 7 HP / Ultimate x64


Have you tried repairing the Outlook installation via the Control Panel?

  1. Open up the Control Panel on your PC (and show All Control Panel items, if necessary) and click on Programs and Features
  2. Find Office 2010 in the list and highlight it
  3. Press the Change button
  4. Select Repair and press Continue and following the prompts
  5. After the repair is finished, please try the sync again.
If all else fails, creating a new profile should fix the problem.
My System SpecsSystem Spec
14 Feb 2012   #3

Windows 7 Ultimate x64

So this all seems to be related to the "DelegateSentItemsStyle" registry key setting. A while back we made it mandatory that all items sent on behalf of a delegate must be saved in the mailbox owner's sent items (DelegateSentItemsStyle=1). As a test I set this key to "0" (disabled the key in other words), sent a message as the delegate, and the message left the Outbox immediately and saved to my own Sent Items.

While I'd prefer to not disable this registry key (because this feature was very useful when a mailbox was shared amongst 10 users), I guess if we want to run Outlook 2010 in online/non-cached mode this is the only way!
My System SpecsSystem Spec

 Messages Stuck In Outbox (Non-Cached Mode + Delegated Mailbox)

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