Error 27726 or Error 27649 When You Try to Install Live Communications Server 2003 (830223)

SYMPTOMS

When you try to install Microsoft Office Live Communications Server 2003, you receive one of the following error messages:

Error 27726. Error '0x80070005' adding trusted server entry in Active Directory. Please make sure the account setup is running under is a member of RTCDomainServerAdmins group.

-or-

Error 27649. Error '0x80070005' getting/creating Microsoft Connection Point under the computer object in Active Directory during 'InstallADEntry'.

When you click OK, the installation is rolled back, and Live Communications Server 2003 is not installed.

CAUSE

This behavior occurs if one of the following conditions exists:

The RTCDomainServerAdmins security group does not have the correct permissions to read objects in the forest root of the Active Directory directory service.

-or-
You are logged on to the server with a user account that is not a member of the Domain Admins security group.

-or-
You are logged on to the server with a user account that is not a member of the RTCDomainServerAdmins security group.

Note This issue will also occur if your user account is added to the RTCDomainServerAdmins security group or to the Domain Admins security group, but you do not log off and then log on to apply the new security permissions.

RESOLUTION

To resolve this issue, use one of or both of the following methods as appropriate to you situation:

Method 1: Verify the User Account Information

Verify all the following information for the user account that you want to use to install Live Communications Server 2003:

The user account is a member of the RTCDomainServerAdmins security group in the domain where you are installing Live Communications Server 2003.
The user account is a member of the Domain Admins security group in the domain where you are installing Live Communications Server 2003.
The user account is a member of the domain that you want to install Live Communications Server 2003 in. For example, if you want to install Live Communications Server 2003 in a domain named domain-2.example.com, the user account that you use to install Live Communications Server 2003 must be a member of the domain-2.example.com domain.
The user has logged off and then logged on to apply the new security permissions if the user was added to the RTCDomainServerAdmins security group or to the Domain Admins security group.

Method 2: Configure Permissions in the Forest Root Domain

Prepare the forest root domain for the installation of Live Communications Server 2003 in a particular domain. To do this, follow these steps:

Log on to a domain controller in the forest root domain.
Run the following command from the Setup\I386\Setup folder on the Microsoft Office Live Communications Server 2003 CD (or from the location where these files are stored)
rtcsrv.msi prep=domainadd domainname=NetbiosName
where NetbiosName is the NetBIOS name of the domain where you want to install Live Communications Server 2003.
When the Live Communications Server Setup Wizard has completed successfully, click Finish.

Note To verify that the permissions have been set correctly:

Start Active Directory Users and Computers.
On the View menu, click Advanced Features.
Right-click the forest root domain, and then click Properties.
Click the Security tab, and then verify that the RTCDomainServerAdmins security group appears for the domain that you added in step 2 of Method 2.