Summary
When Skype for Business Server is deployed in a hybrid configuration in Entra ID, features such as archiving data into Exchange mailboxes and providing calendar-based updates become available between Skype for Business Server and Exchange Online. Â
To enable hybrid functionality, Skype for Business Server uses a shared service principal together with Exchange Online for secure communication. However, this process is being deprecated beause of security concerns. To prepare for this significant change, a configuration update is required in your Skype for Business Server hybrid environment.Â
Resolution
To apply this change, install the following hotfix updates accordingly:Â
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August 2025 hotfix update 7.0.2046.820 for Skype for Business Server SE, Core Components (5064805)
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August 2025 hotfix update 7.0.2046.820 for Skype for Business Server Subscription Edition, Enterprise Web App (KB5064897)​​​​​​​
For more information about how to configure the Skype for Business Server Hybrid Application, see Configure dedicated hybrid application in Skype for Business Server.
