Manual Schema Changes Are Lost When You Apply Exchange Server 2003 Schema over Exchange 2000 Server Schema (818583)
The information in this article applies to:
- Microsoft Exchange Server 2003 Standard Edition
- Microsoft Exchange Server 2003 Enterprise Edition
SYMPTOMSWhen you apply the Exchange Server 2003 schema over an existing
Microsoft Exchange 2000 Server schema, any manual changes that were made previously to the
Exchange 2000 schema are lost.CAUSEExchange Server 2003 Setup updates the Microsoft Active Directory
directory service schema and overwrites the existing Exchange 2000 schema
information.MORE INFORMATIONIn an Exchange 2000 environment that has only Exchange 2000
schema extensions applied, the ms-Exch-Schema-Version-Pt attribute has a
rangeUpper value set to 4397. Microsoft Exchange 2000 Server Setup uses this value to determine
if any schema updates are necessary when you run the setup
/forestprep command. If setup /forestprep is
run again, Setup sees that the value of ms-Exch- Schema-Version-Pt
is still set to 4397. Setup does not make any additional schema updates. As a result, any
manual modifications to the schema are preserved.
Exchange Server 2003 reads
the same attribute, but if it detects that the value is set to 4397 or to any value that is lower than
the Exchange Server 2003 schema version, it extends the schema by importing files
Schema0.ldf through Schema9.ldf. Previous manual updates are changed in favor
of the new schema.WORKAROUNDTo work around this behavior, you must reapply the manual
changes after Exchange Server 2003 has updated the schema.STATUSThis is typical behavior for Exchange 2000 and Exchange Server 2003
when you run Setup.
| Modification Type: | Minor | Last Reviewed: | 11/9/2005 |
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| Keywords: | kbprb kbnofix kbBug KB818583 kbAudITPRO |
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