Delegate data is not removed when you run the Remove-CsSlaDelegates cmdlet in Skype for Business Server 2015 Content provided by Microsoft Applies to: Skype for Business Server 2015 Select Product Version All Products Symptoms When you run the Remove-CsSlaConfiguration or Remove-CsSlaDelegates cmdlet in a Microsoft Skype for Business Server 2015 environment, the cmdlet doesn't remove the delegate records from the Breakthrough container in the database.Note This issue may also occur when you run both cmdlets. Resolution To fix this issue, install the March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015, core components. Last Updated: Mar 18, 2016 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.