Preparing the

Microsoft Lync Server

and

Skype for Business

topology for

BEMS

The

Connect

service and

Lync

Presence

Provider (LPP) are

Microsoft Lync

trusted-UCMA applications.

To provision the computer hosting the

Connect

and

Presence

services as trust application servers with the

Microsoft Lync Server

and

Skype for Business

, you must use the

Microsoft Lync Server

or

Skype for Business

Management Shell to complete the following tasks:

A trusted application pool is a virtual pool or container of one or more trusted application servers, (for example, the

Connect

service and the

Presence

service). The trusted application cmdlets define parameters for the services available in the trusted application servers that are associated with the trusted application pool, (for example, the application identifier for

Connect

service and the

Presence

service and the listening ports used by these services). The trusted application pool doesn't provide load balancing services for the

Connect

and

Presence

services. It only provides configuration and registration information to the

Microsoft Lync Server

or

Skype for Business

to allow the messaging servers to route incoming chat requests or presence status updates to the mobile users being managed by each

Connect

and

Presence

service. A

BlackBerry Connect

app user cannot be represented by more than one

BEMS-Connect

service at any time. Any type of load balancing or user endpoint distribution is managed by the

Connect

service directly. For more information about sizing requirements, see the BEMS Performance Calculator.

A trusted application endpoint represents a virtual user to allow the

Presence

service to subscribe to SIP-enabled users to receive presence availability updates and make this information available to mobile users (for example,

BlackBerry Work

users). One or more trusted application endpoints must be created for each

Presence

service on the

Microsoft Lync Server

or

Skype for Business

to process subscriptions. "Trusted application endpoint" only refers to the virtual user used by the

Presence

service to make the subscription requests. The endpoint remains on the computer hosting the

BEMS-Presence

service. The

Presence

service only communicates with the Front End Pool using port 5061. When a subscription is made to a SIP-enabled user to receive availability updates, the

Microsoft Lync Server

or

Skype for Business

Front End Pool sends the user's updated presence status on port 49777 to the

Presence

service. The number of subscriptions handled by each

Presence

service and each trusted application endpoint used by the

Presence

service is managed by the

Presence

service. For more information about creating trusted application endpoints, see "Manually configure the Presence service for multiple application endpoints" in the Presence Configuration content.

If you change the instant messaging server from

Microsoft Lync Server

to

Skype for Business

, you must remove the existing provisioning of

BEMS

as a trusted application and trusted application pool and then establish trust with the Create a trusted application pool by preparing the initial computer hosting

Skype for Business

server. For steps on changing the instant messaging service, see Steps to upgrade BEMS and change the instant messaging service.

You must complete the application provisioning process described in the following instructions:

Preparing the initial computer hosting
BEMS
Preparing additional computers hosting
BEMS
.
If you installed the
BEMS
services on separate computers, you must complete this step for each computer.

After updating the topology, the administrator must delegate RTCUniversalReadOnlyAdmins permission to the

BEMS

service account for the

BEMS

Dashboard to access the provisioning information during the

BEMS

configuration process.