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  1. BlackBerry Docs
  2. BlackBerry Enterprise Mobility Server 3.7
  3. Configuring the BlackBerry Presence service
  4. Configuring the BlackBerry Presence service in the BEMS Dashboard
  5. Manually configure the Presence service for multiple application endpoints

Manually configure the
Presence
 service for multiple application endpoints

You can manually configure multiple application endpoints for
BlackBerry Presence
 to load balance
Presence
 requests between multiple endpoints on a single
BEMS
 instance.
Cisco Jabber
, and
Skype for Business
 on-premises using non-trusted application mode do not support multiple application endpoints.
If you installed the
Presence
 service on multiple computers, complete this task on each computer that hosts the
Presence
 service. 
You must have a
Skype for Business
 setup in your environment.
  1. On the computer that hosts
    BEMS
    , navigate to the
    LyncPresenceProviderService.exe.config
     file. By default, the LyncPresenceProviderService.exe.config file is located in
    <
    drive
    >:\Program Files\BlackBerry\BlackBerry Enterprise Mobility Server\Good Presence
    .
  2. In a text editor, open the
    LyncPresenceProviderService.exe.config
     and record the values for the following properties:
    • UCMA_APPLICATION_NAME
    • LYNC_TRUSTED_APPLICATION_POOL
    • UCMA_ENDPOINT_SIP
  3. Determine a naming convention for the additional Trusted Application Endpoints (virtual SIP addresses). By default, the format for the existing SIP Addresses is sip:presence_<
    BEMSFQDN
    >@<
    SIPDomain
    >. For example, sip:presence_BEMSServer1-01.example.com@example.com, sip:presence_BEMSServer1-02.example.com@example.com, and so on.
  4. Create the additional Trusted Application Endpoints in the
    Skype for Business
     topology using the information from steps 2 and 3 above. For instructions on creating additional Trusted Application Endpoints, see "Prepare additional computers hosting BEMS" in the Installation content.
  5. In a text editor, open
    LyncPresenceProviderService.exe.config
    .
  6. Locate the
    <ucmaEndpointSips>
     section. Add the value of the new additional application endpoints that you published in step 4.
    For example, 
    <ucmaEndpointSips>
        <collection>
          <add item="sip:presence_BEMSServer1.example.com@example.com" />
          <add item="sip:presence_BEMSServer1-01.example.com@example.com" />
          <add item="sip:presence_BEMSServer1-02.example.com@example.com" />
        </collection>
      </ucmaEndpointSips>
  7. Specify the maximum contact subscriptions that each application endpoint can manage. By default, the MAX_SUBSCRIPTIONS_PER_ENDPOINT is 1000. You can specify a subscription value between 1 and 5000. For example, if you specify that each application endpoint can manage 2000 contact subscriptions, you would locate the MAX_SUBSCRIPTIONS_PER_ENDPOINT key and change the value as required. 
    <add key="MAX_SUBSCRIPTIONS_PER_ENDPOINT" value="2000" />
    Specifying the MAX_SUBSCRIPTIONS_PER_ENDPOINT, doesn't load balance the subscriptions across all endpoints, it assigns 2000 subscriptions to the first endpoint before assinging the next 2000 subscriptions to the next endpoint.
  8. Save the file.
  9. Restart the
    Good Technology Presence
     service from the
    Windows
     Service Manager.