If you store global settings in the Configuration container (as is the case for all new Microsoft Lync Server 2010 deployments), forest preparation uses the existing Services container and adds an RTC Service object under the Configuration\Services object. Under the RTC Service object, forest preparation adds a Global Settings object of type msRTCSIP-GlobalContainer. The global settings object holds all the settings that apply to the Lync Server 2010 deployment. If you store global settings in the System container, forest preparation uses a Microsoft container under the root domain System container and an RTC Service object under the System\Microsoft object.

Forest preparation also adds a new msRTCSIP-Domain object for the root domain in which the procedure is run.

Forest preparation creates universal groups based on the domain that you specify and adds access control entries (ACEs) for these groups. This step creates the universal groups in the User containers of the domain that you specify.

Universal groups allow administrators to access and manage global settings and services. Forest preparation adds the following types of universal groups:

• Administrative groups   These groups define administrator roles for a Lync Server network.
  
  
• Infrastructure groups   These groups provide permission to access specific areas of the Lync Server infrastructure. They function as components of administrative groups. You should not modify these groups or add users directly to them.
  
  
• Service groups   These groups are service accounts that are required to access various Lync Server services.
  
  

The following table describes the administrative groups.

Administrative Groups Created During Forest Preparation

Administrative group	Description
RTCUniversalServerAdmins	Allows members to manage server and pool settings, including all server roles, global settings, and users.
RTCUniversalUserAdmins	Allows members to manage user settings and move users from one server or pool to another.
RTCUniversalReadOnlyAdmins	Allows members to read server, pool, and user settings.

The following table describes the infrastructure groups.

Infrastructure Groups Created During Forest Preparation

Infrastructure group	Description
RTCUniversalGlobalWriteGroup	Grants write access to global setting objects for Lync Server.
RTCUniversalGlobalReadOnlyGroup	Grants read-only access to global setting objects for Lync Server.
RTCUniversalUserReadOnlyGroup	Grants read-only access to Lync Server user settings.
RTCUniversalServerReadOnlyGroup	Grants read-only access to Lync Server settings. This group does not have access to pool level settings, only to settings specific to an individual server.

The following table describes the service groups.

Service Groups Created During Forest Preparation

Service group	Description
RTCHSUniversalServices	Includes service accounts used to run Front End Server and Standard Edition servers. This group allows servers read/write access to Lync Server global settings and Active Directory user objects.
RTCComponentUniversalServices	Includes service accounts used to run A/V Conferencing Servers, Web Services, Mediation Server, Archiving Server, and Monitoring Server.
RTCProxyUniversalServices	Includes service accounts used to run Lync Server Edge Servers.

Forest preparation then adds service and administration groups to the appropriate infrastructure groups, as follows:

• RTCUniversalServerAdmins is added to RTCUniversalGlobalReadOnlyGroup, RTCUniversalGlobalWriteGroup, RTCUniversalServerReadOnlyGroup, and RTCUniversalUserReadOnlyGroup.
  
  
• RTCUniversalUserAdmins is added as a member of RTCUniversalGlobalReadOnlyGroup, RTCUniversalServerReadOnlyGroup, and RTCUniversalUserReadOnlyGroup.
  
  
• RTCHSUniversalServices, RTCComponentUniversalServices and RTCUniversalReadOnlyAdmins are added as members of RTCUniversalGlobalReadOnlyGroup, RTCUniversalServerReadOnlyGroup, and RTCUniversalUserReadOnlyGroup.
  
  

Forest preparation also creates the following role-based access control (RBAC) groups:

• CSAdministrator
  
  
• CSArchivingAdministrator
  
  
• CSBranchOfficeTechnician
  
  
• CSHelpDesk
  
  
• CSLocationAdministrator
  
  
• CSResponseGroupAdministrator
  
  
• CSServerAdministrator
  
  
• CSUserAdministrator
  
  
• CSViewOnlyAdministrator
  
  
• CSVoiceAdministrator
  
  

For details about RBAC roles and the tasks allowed for each, see Role-Based Access Control in the Planning documentation.

Forest preparation creates both private and public ACEs. It creates private ACEs on the global settings container used by Lync Server. This container is used only by Lync Server and is located either in the Configuration container or the System container in the root domain, depending on where you store global settings. The public ACEs created by forest preparation are listed in the following table.

Public ACEs created by Forest Preparation

ACE	RTCUniversalGlobalReadOnlyGroup
Read root domain System Container (not inherited)*	X
Read Configuration’s DisplaySpecifiers container (not inherited)	X

On the Configuration container, under the Configuration naming context, forest preparation performs the following tasks:

• Adds an entry {AB255F23-2DBD-4bb6-891D-38754AC280EF} for the RTC property page under the adminContextMenu and adminPropertyPages attributes of the language display specifier for users, contacts, and InetOrgPersons (for example, CN=user-Display,CN=409,CN=DisplaySpecifiers).
  
  
• Adds an RTCPropertySet object of type controlAccessRight under Extended-Rights that applies to the User and Contact classes.
  
  
• Adds an RTCUserSearchPropertySet object of type controlAccessRight under Extended-Rights that applies to User, Contact, OU, and DomainDNS classes.
  
  
• Adds msRTCSIP-PrimaryUserAddress under the extraColumns attribute of each language organizational unit (OU) display specifier (for example, CN=organizationalUnit-Display,CN=409,CN=DisplaySpecifiers) and copies the values of the extraColumns attribute of the default display (for example, CN=default-Display, CN=409,CN=DisplaySpecifiers).
  
  
• Adds msRTCSIP-PrimaryUserAddress, msRTCSIP-PrimaryHomeServer, and msRTCSIP-UserEnabled filtering attributes under the attributeDisplayNames attribute of each language display specifier for Users, Contacts, and InetOrgPerson objects (for example, in English: CN=user-Display,CN=409,CN=DisplaySpecifiers).