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    Hi,

    We currently have a single Exchange 2007 server using GAL segregation (which I believe is not supported by Microsoft). I want set up a co-existence with a single Exchange 2010 server. My question is - has anyone done this before? If so, what affect did it have on the existing 2007 GAL segregation config?

    Monday, July 1, 2013 5:48 PM

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    Hi  ,

    If you are planning on using Exchange 2010 and you currently have Exchange 2007 using Address List segregation, you must remove all address list segregation from your organization to avoid running into the bug that we are currently working on at this time.

    CRITICAL UPDATE - Exchange 2010 Address List Segregation and Current Support Stances:

    http://blogs.msdn.com/b/dgoldman/archive/2010/05/10/critical-update-exchange-2010-address-list-segregation-and-current-support-stances.aspx

    Wendy Liu
    TechNet Community Support

    • Proposed as answer by Bruce JDC Tuesday, July 9, 2013 9:11 AM
    • Marked as answer by wendy_liu Wednesday, July 10, 2013 6:20 AM
    Tuesday, July 2, 2013 9:18 AM
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    It is not fixed because that not a bug. Exchange 2007 segregation isn't supported so it dont't need a fix.

    The point being Exchange 2010 servers may not be able to access the GAL, which can conduct to serious errors in recipients. You need to remove segregation prior to the migration, or set a new independant forest and move the users between.

    Bruce Jourdain de Coutance - Consultant Exchange http://brucejdc.blog.free.fr

    • Proposed as answer by Bruce JDC Tuesday, July 9, 2013 9:11 AM
    • Marked as answer by wendy_liu Wednesday, July 10, 2013 6:20 AM
    Tuesday, July 9, 2013 9:11 AM

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    Hi  ,

    If you are planning on using Exchange 2010 and you currently have Exchange 2007 using Address List segregation, you must remove all address list segregation from your organization to avoid running into the bug that we are currently working on at this time.

    CRITICAL UPDATE - Exchange 2010 Address List Segregation and Current Support Stances:

    http://blogs.msdn.com/b/dgoldman/archive/2010/05/10/critical-update-exchange-2010-address-list-segregation-and-current-support-stances.aspx

    Wendy Liu
    TechNet Community Support

    • Proposed as answer by Bruce JDC Tuesday, July 9, 2013 9:11 AM
    • Marked as answer by wendy_liu Wednesday, July 10, 2013 6:20 AM
    Tuesday, July 2, 2013 9:18 AM
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    This blog only refers 2010 SP1. We will be installing SP2. Aren't the bugs fixed in SP2?
    Tuesday, July 2, 2013 2:07 PM
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    Does anyone know if this is fixed in 2010 SP2?

    If not, Do you have a paper on what breaks? Maybe I can write a script to run during the installation process. Thanks
    Monday, July 8, 2013 8:36 PM
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    It is not fixed because that not a bug. Exchange 2007 segregation isn't supported so it dont't need a fix.

    The point being Exchange 2010 servers may not be able to access the GAL, which can conduct to serious errors in recipients. You need to remove segregation prior to the migration, or set a new independant forest and move the users between.

    Bruce Jourdain de Coutance - Consultant Exchange http://brucejdc.blog.free.fr

    • Proposed as answer by Bruce JDC Tuesday, July 9, 2013 9:11 AM
    • Marked as answer by wendy_liu Wednesday, July 10, 2013 6:20 AM
    Tuesday, July 9, 2013 9:11 AM
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    OK thanks for the info.
    Wednesday, July 10, 2013 2:22 PM