XFOR: Importing Large Numbers of MHS Addresses is Very Slow

• Microsoft Exchange Server, version 4.0

SYMPTOMS

Importing large numbers of Message Handling Service (MHS) addresses is excessively slow.

CAUSE

A regular MHS address has the form mailbox@node. An extended MHS address has the form placeholder@node{real address}. By default, the DXA parses against the placeholder@node portion of the transaction record and attempts to create a unique alias and proxies using this data.

Using the following example import file, you can see where the slowdown occurs.

   AUser AMHS:ServerA@Company{ccmail:usera}
   AUser BMHS:ServerA@Company{ccmail:userb}
   AUser CMHS:ServerA@Company{ccmail:userc}
   AUser DMHS:ServerA@Company{ccmail:userd}
   ...
   AUser AAAMHS:ServerA@Company{ccmail:useraaa}

WORKAROUND

A hotfix is now available that provides a registry setting to tell the Directory Synchronization service (DXA) to use the extended portion of an MHS address for alias and proxy name generation.

NOTE: This hotfix will only parse SMTP and ccMAIL type addresses from the extended address. From an SMTP address it will take the xxx out of an xxx@yyy.com type address and from a ccMAIL address it will take the xxx out of a CCMAIL:xxx type address.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 4.0. This problem was corrected in the latest Microsoft Exchange 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

   S E R V P A C K