XADM: Access Violation in Information Store When You Log On to a Mailbox by Using an Account Name That Contains Double-Byte Characters

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Article ID: 326393 - View products that this article applies to.
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When you log on to a mailbox by using an account name that contains characters from a double-byte character set (DBCS), the Microsoft Exchange Information Store service may stop responding and generate an access violation (AV) error. The call stack may appear similar to the following:
ChildEBP RetAddr  
10deee74 67205d44 ntdll!RtlpFindAndCommitPages+0x106
10deeeb0 67206e70 ntdll!RtlpExtendHeap+0x72
10deef5c 6fff1921 ntdll!RtlAllocateHeap+0x253
10deef80 6fff1383 exchmem!MpHeapAlloc+0x101
10deef90 0042c4db exchmem!ExchMHeapAlloc+0x13
10deefb0 0042c4a5 store!EcCompressDN+0x28 292]
10deefcc 0042cb76 store!JTAB_BASE::EcMakeDNKey+0x37 
10deefe8 0042c631 store!EcSeekMailbox+0x48 6549]
10def020 004b576c store!LOGON::EcLookupFidRoot+0x6f 
10def6b4 004b699b store!LOGON::EcConfig+0x97c 
10def790 004c55f8 store!EcDoPrivateLogonOp+0x478 
10defa14 0040e941 store!EcLogon+0x245 
10defaf4 0040e614 store!EcRpc+0x2cf 
10defb08 77e11dc7 store!EcDoRpc+0x41 
10defb28 77e56205 rpcrt4!Invoke+0x28
10defb44 77e561d6 rpcrt4!NdrCallServerManager+0x15
10defe08 77e55f3e rpcrt4!NdrStubCall+0x292
10defe20 77e113a4 rpcrt4!NdrServerCall+0x19
10defe5c 77e111be rpcrt4!DispatchToStubInC+0x33
10defeb0 77e11403 rpcrt4!RPC_INTERFACE::DispatchToStubWorker+0xb0


This problem may occur if all the following conditions exist:
  • The user account name contains at least one DBCS character.
  • Exchange 2000 Server is on a computer that is running the English version of Microsoft Windows 2000 Server.
  • The computer's default locale is set to a DBCS language and the computer uses a language pack.


To resolve this problem, install the Microsoft Exchange 2000 Server Post-Service Pack 3 Messaging Database patch.

For additional information about how to obtain this update, click the article number below to view the article in the Microsoft Knowledge Base:
329882 XGEN: Post-Exchange 2000 Server Service Pack 3 Messaging Database Fixes That Are Available


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.


Article ID: 326393 - Last Review: October 26, 2013 - Revision: 4.3
  • Microsoft Exchange 2000 Server Standard Edition
  • Microsoft Exchange 2000 Enterprise Server
kbnosurvey kbarchive kbbug kbfix kbexchange2000presp3fix kbqfe kbexchange2000sp3fix kbexchange2000presp4fix kbhotfixserver KB326393

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