Article ID: 320073 - View products that this article applies to.
This article was previously published under Q320073
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If you use Active Directory Users and Computers to create mail-enabled users or Contacts on a workstation that Exchange System Manager is installed on, you may receive the following error message:
You may also receive the following remote procedure call (RPC) error message:
An Exchange Server could not be found in the domain.
Check if the Microsoft System Attendant service is running on the Exchange Server.
ID no: c10308a2
Microsoft Active Directory - Exchange Extension
NOTE: If you create mailbox-enabled users or non-mail enabled users or Contacts, Active Directory Users and Computers works correctly.
The RPC server is unavailable.
Facility: Win32 ID no: c00706ba
This behavior may occur if:
To work around this behavior, make sure that the Exchange System Attendant service is running and file and printer sharing is enabled on at least one Exchange server in the administrative group. Also make sure that you can connect to a file share on that same Exchange server from the workstation.
To work around this behavior if file and printer sharing is disabled, you can create mail-enabled users or Contacts on the Exchange server itself if the System Attendant service on that Exchange server is running.
When you create mail-enabled users or Contacts on a workstation, file and printer sharing must be enabled on the Exchange server so that the server can make sure that the e-mail address that you give the Contact is unique in the forest.
Mail-enabled users and Contacts have e-mail addresses associated with them. Mailbox-enabled users are users with Exchange mailboxes.
When you create mailbox-enabled users, you do not receive the error message in the "Symptoms" section of this article. This is because the Recipient Update Service that is running on an Exchange server in the System Attendant service is responsible for assigning e-mail addresses to the mailbox-enabled users and verifying that they are unique.
The Recipient Update Service assigns and checks e-mail addresses after you create the user; therefore; you do not receive the error message when you create a mailbox-enabled user.