while running setup.com /prepareAD from exchange 2010 Sp1 it gives erro as exsetup.exe stopped working with the following message as Description: Stopped working Problem signature: Problem Event Name: CLR20r3 Problem Signature 01: exsetup.exe Problem Signature 02: 14.1.218.15 Problem Signature 03: 4c70b66f Problem Signature 04: mscorlib Problem Signature 05: 2.0.0.0 Problem Signature 06: 4e1539fa Problem Signature 07: 3f1 Problem Signature 08: 14 Problem Signature 09: N3CTRYE2KN3C34SGL4ZQYRBFTE4M13NB OS Version: 6.1.7601.2.1.0.272.7 Locale ID: 1033 when we run same preparead on DC it works................any ideas?

Hello, why do you want to do /prepareAD again? You said you've executed it on your DC so you won't have to execute it again on the Exchange Server. Greetings, Toni

Hi What is the result when you run setup file ?Terence Yu TechNet Community Support