You must be using the Outlook 2013 client with the latest updates or the Outlook 2016 client. You must be using the Skype for Business 2015 full client with the latest updates or the Skype for Business 2016 full client. Setting up and getting delegation to work correctly depends on you following these guidelines: Guidelines and requirements Guidelines for delegation
This article gives you guidance for setup recommendations, best practices, and troubleshooting steps. This article explains how to set up and troubleshoot Skype for Business Online delegation. Remember that a successful upgrade aligns technical and user readiness, so be sure to leverage our upgrade guidance as you navigate your journey to Teams. If you want to upgrade your organization to Teams yourself, we strongly recommend that you begin planning your upgrade path today. If you haven't upgraded your Skype for Business Online users to Microsoft Teams before that date, they will be automatically scheduled for an assisted upgrade. Skype for Business Online will be retired on July 31, 2021.
