Before beginning this procedure, review all Active Directory extensions that will be modified for Office Communications Server using a text editor such as Notepad. (This step is optional, but it can be useful in an Enterprise environment.) The Schema.ldf file is located in the root folder of the installation CD. Office Communications Server schema extensions are replicated across all child domains, which impacts network bandwidth.

For details about preparing schemas, see Preparing Active Directory Domain Services for Office Communications Server 2007 R2in the Deployment documentation.

Preparing the Schema

Run SchemaPrepat a time when network utilization is low. SchemaPrepmust access the Schema Master. To access the Schema Master, the remote registry service must be running with the remote registry key enabled. To prepare the schema of the current forest, you should log on to a computer in the Active Directory domain with Schema Admins credentials and administrator credentials on the Schema Master as follows.

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LCSCmd.exe /Forest /Action:SchemaPrep [/ldf:<folder where the
.ldf file is located>]

Such as:

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LCSCmd.exe /Forest /Action:SchemaPrep

Use the CheckSchemaPrepStateaction to verify that Schema Prep completed successfully.

Check Schema State

Use the CheckSchemaPrepStateaction to check Active Directory schema state. The syntax for the CheckSchemaPrepStateaction follows.

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LCSCmd.exe /Forest[:<forest FQDN>]

Such as:

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LCSCmd.exe /Forest /Action:CheckSchemaPrepState

Before the schema has been prepared, the log file generated by CheckSchemaPrepStatewill show a Schema Prep State of None. After the schema has been successfully prepared, the Schema Prep State will be Office Communications Server 2007 R2.