Microsoft KB Archive/260789

= XCCC: Error Message When Scheduling Conference in Exchange Mixed Site =

Article ID: 260789

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition
 * Microsoft Exchange 2000 Conferencing Server
 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q260789



SYMPTOMS
In a mixed site that is running Exchange 2000 Conferencing Server, an Exchange Server 5.5 user who schedules a conference may receive the following error message:

Please select an Exchange conferencing mailbox as the resource. The information store could not be opened.



CAUSE
This issue can occur if there is a one-way user connection agreement and the mailbox object replicates to the Active Directory through a different user connection agreement and overwrites the Exchange 2000 Distinguished Name (DN) in the Active Directory with the Exchange 5.5 DN.



RESOLUTION
To resolve this issue, delete the one-way user connection agreement. Use the Active Directory Connector Manager to configure a two-way recipient connection agreement between the Exchange 5.5 Recipients container and the Windows 2000 Users tree in the Active Directory.



STATUS
This issue is by design.



MORE INFORMATION
For related information, see the following article in the Microsoft Knowledge Base:

294206 XCCC: Conferencing Resources Are Difficult to Locate in Exchange 5.5 GAL

Additional query words: exch2kp2w

Keywords: kbbug kberrmsg kbnofix kbprb KB260789

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