/mcpTo view the status of a presence entity, watchers send presence requests to Unified Communications Manager. The system requires watchers to be authorized to initiate status requests for a presence entity with these requirements: • The watcher BLF presence group be authorized to obtain the status for the presence entity presence group, whether inside or outside of the cluster. • Unified CM must be authorized to accept BLF presence requests from an external presence server or application. Before you begin Configure Cluster-Wide Service Parameters for BLF, on page 532 Procedure Step 1 From Cisco Unified CM Administration, choose System > BLF Presence Group. Step 2 Configure the fields in the BLF Presence Group Configuration window. See BLF Presence Group Fields for BLF, on page 533 for details about the fields and their configuration options. Note Use the Default Inter-Presence Group Subscription service parameter for the Cisco CallManager service. It sets the clusterwide permissions parameter for BLF presence groups to allow subscription or disallow subscription. This field enables administrators to set a system default and configure BLF presence group relationships by using the default field for the cluster. Step 3 Click Save. Note The permissions that you configure for a BLF presence group appear in the BLF Presence Group Relationship pane. Permissions that use the system default permission field for the group-to-group relationship do not appear. What to do next Associate BLF presence group with devices and users by performing the following subtasks: • Associate BLF Presence Groups with Phone, on page 534 • Associate BLF Presence Groups with SIP Trunk, on page 535 • Associate BLF Presence Groups with End User, on page 536 • Associate BLF Presence Groups with Application User, on page 537 BLF Presence Group Fields for BLF Presence authorization works with BLF presence groups. The following table describes the BLF presence group configuration fields. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 533 Presence and Privacy Features BLF Presence Group Fields for BLF