expansion and auto-attendance. This attribute is defined in the default Active Directory schema for Windows 2003 R2.
To avoid requiring an upgrade of Active Directory to Windows 2003 R2, Office Communications Server schema preparation extends the Windows 2000 or Windows 2003 schema with this attribute definition.
This existing attribute is used by the voice components in Office Communications Server, for contact objects only, for the purpose of routing calls to the unified messaging auto-attendant and subscriber access numbers. The unconditional call forwarding address is stored in this multi-valued attribute. This account is created for the specific purpose of auto-attendant and subscriber access. This account’s attributes should not be modified by administrators.
This existing multi-valued attribute is part of the base Active Directory schema introduced in Windows 2000. This attribute contains the various X400, X500, and SMTP addresses of the user’s e-mail. In Live Communications Server 2003 and later, the user’s SIP URI is added to this list, using the "sip:" tag.
The following applications search the user’s SIP URI from this attribute:
Microsoft Office Outlook 2003 messaging and collaboration client
Microsoft Office SharePoint Server 2007