Server Draining

A useful feature in Lync Server 2013 is the concept of draining a server when preparing it for maintenance. This enables an administrator to prepare a server for maintenance without immediately affecting users. Existing sessions on the server are ended immediately and users are transferred to a different server within the pool.

To prepare a server for maintenance, follow these steps:

1. Open the Lync Server Control Panel.

2. Click Topology.

3. Highlight the server to be modified.

4. Click Action and select Prevent New Connections for All Services.

5. Alternatively, double-click the server to drill down further and manage the individual services.

Note

Preventing new connections is a feature that only works with DNS load balancing and has no effect on whether a hardware load balancer continues to send traffic to a server. If using a hardware load balancer, perform the draining steps there instead.

This feature also does not cover load balancing of the web component services. The hardware load balancer used to distribute traffic to these services must also be drained to prevent new connections to the server prepared for maintenance.

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