I guess you are using a RadDocking control as a parent of the RadOutlookBar. We are aware of similar issues and we have previously logged an issue related. We have also logged a feature request for implementing a Minimize/Restore events. You can vote for these two in order to increase its development priority. You can also send us some code so that we could provide a workaround if possible. Thank you for your understanding.
the Telerik team
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