My current domain is windows 2000. I have got a new Dell Server, on which I
have already installed windows Server 2003 from Action Pack & then tried to
implement Exchange server 2003 on it.

I started running the Exchange CD, & while running domainprep, I got an
error showing “this version of windows this has known compatibility issues”,
but since the pop-up window had options like continue/cancel/abort, I
continued it, during which only 8 of 10 steps was done on schema update.

Since the above was not completed fully, I tried to run "adprep /forestprep"
tool on windows 2000 domain controller, upon which I got the error as shown
below,

==================================

"attributeId" attribute value for objects defined in Windows 2000 schema and
ext
ended schema do not match.


A previous schema extension has defined the attribute value as
"1.2.840.113556.1
..4.7000.187.102" for object
"CN=uid,CN=Schema,CN=Configuration,DC=O2INDIA,DC=com
" differently than the schema extension needed for Windows 2003 server .
[Status/Consequence]
Adprep cannot extend your existing schema
[User Action]
Contact the vendor of the application that previously extended the schema to
res
olve the inconsistency. Then run adprep again.

=============================================================================
"isSingleValued" attribute value for objects defined in Windows 2000 schema
and
extended schema do not match.


A previous schema extension has defined the attribute value as "TRUE" for
object
"CN=uid,CN=Schema,CN=Configuration,DC=O2INDIA,DC=com" differently than the
sche
ma extension needed for Windows 2003 server .
[Status/Consequence]
Adprep cannot extend your existing schema
[User Action]
Contact the vendor of the application that previously extended the schema to
res
olve the inconsistency. Then run adprep again.

=============================================================================
"attributeSyntax" attribute value for objects defined in Windows 2000 schema
and
extended schema do not match.


A previous schema extension has defined the attribute value as "2.5.5.5" for
obj
ect "CN=uid,CN=Schema,CN=Configuration,DC=O2INDIA,DC=com" differently than
the s
chema extension needed for Windows 2003 server .
[Status/Consequence]
Adprep cannot extend your existing schema
[User Action]
Contact the vendor of the application that previously extended the schema to
res
olve the inconsistency. Then run adprep again.
Please help me to resolve this.

=======================================

Awaiting reply.