This article was previously published under Q317861
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After an Active Directory Connector (ADC) replication, users cannot log on to their Exchange Server 5.5 mailboxes. They receive an access denied error message. If you look at the permissions on the mailbox in the Exchange Server 5.5 Administrator program, you see that the mailbox owner right has been removed from the permissions for that account and that the user's role has been changed to Custom.
The recipient connection agreement has been changed from a one-way agreement to a two-way agreement.
IMPORTANT: See the following Microsoft Knowledge Base article for clean up steps on any accounts that are already affected:
317721 XADM: Exchange Server 5.5 Mailbox Owner Rights Are Removed When You Change the ADC Connection Agreement from a One-Way Connection Agreement to a Two-Way Connection Agreement
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
301378 XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
The English version of this fix should have the following file attributes or later:
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 3.