Worker thread consideration

Microsoft Outlook creates multiple HTTP connections when communicating with Microsoft Exchange using RPC over HTTP. Each Outlook client connection uses multiple worker threads in WebSEAL. The number of worker threads that each Outlook client uses in WebSEAL can exceed 10. These threads are held for the length of time the Outlook client remains connected to the Exchange server. The use of numerous worker threads for every RPC over HTTP client connection via WebSEAL can lead to worker thread starvation.

WebSEAL has a limited number of worker threads available. Limited threads limits the number of clients that can access WebSEAL at any point in time. When deploying WebSEAL for use with RPC over HTTP in an Outlook and Exchange environment, consider the number of worker threads being used.

Parent topic: Microsoft RPC over HTTP

Related concepts