An attempt to connect to "BizTalkMgmtDb" SQL Server database on server "<server name>" failed with error: "Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'."
This issue typically occurs when the BizTalk Server-based server processes a high volume of documents, because Microsoft Windows Server 2003 Service Pack 1 (SP1) implements a security feature that reduces the size of the queue for concurrent TCP/IP connections to the server. See ME899599 for a resolution.
This problem may occur when you log on to a BizTalk Server-based server by using an anonymous user account and then you run a query in the HAT tool. See ME884628 to solve this problem.
As per Microsoft: "The ASP.NET worker process does not have access to the BizTalk Management database". See the link to "Microsoft event 6913 from source BizTalk Server 2004" for details.
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