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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.