Dear All, could you help me with the matter we've got a problem when installing Exchange 2010 EE Client Access Role on Windows Server 2008 R2 Standard Edition The log of the problem: Summary: 3 item(s). 1 succeeded, 1 failed. Elapsed time: 00:00:05 Preparing Setup Completed Elapsed Time: 00:00:00 Client Access Role Failed Error: The following error was generated when "$error.Clear(); $InternalOwaUrl="https://" + $RoleFqdnOrName + "/owa"; new-OwaVirtualDirectory -DomainController $RoleDomainController -InternalUrl $InternalOwaUrl;" was run: "An error occurred while creating the IIS virtual directory 'IIS://SERVER01.contoso.com/W3SVC/1/ROOT/owa' on 'SERVER01'.". An error occurred while creating the IIS virtual directory 'IIS://SERVER01.contoso.com/W3SVC/1/ROOT/owa' on 'SERVER01'. ISAPI extension owaauth.dll in group MSExchangeClientAccess wasn't found and its status can't be changed. Please make sure this ISAPI extension (IIS Web service extension) is still listed in IIS Manager. If it's not, it may need to be added again. Elapsed Time: 00:00:04 Finalizing Setup CancelledMCSE

Hi, delete ClientAccessRole Key under HKLM\software\microsoft\exchange\v8.0 Go to ADSIEDIT => Exchange Servername object and change the value of msexchcurrentserver to 34 Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320

Hi, I can't find this KEY HKLM\software\microsoft\exchange\v8.0 - only v14 exist MCSE

I think you may have an issue with not having the pre-requisites installed properly. I have posted a video on www.insidetheregistry.com on how to install Exchange Pre-Reqs for EX2010 with a custom script. I have seen weird issues like this before and after re-running the script on the server problems went away. Not sure if this is your issue but it is worth a shot. Thanks, Dave Kawula Principal Consultant TriCon Technical Services Inc www.triconts.com dkawula@triconts.com www.insidetheregistry.com

Hi Alexander, Please check whether you have already installed all prerequisites: Exchange 2010 Prerequisites http://technet.microsoft.com/en-us/library/bb691354.aspx After that, please go to Server Manager->Roles->Web Server(IIS)->Roles Services Check whether ISAPI Extensions is installed or not. If it is installed, please go to IIS Manager-> Server name->ISAPI and CGI Restrictions: Delete the "Microsoft Exchange Client Access server" entry. Then go to Registry Editor: HKLM\software\microsoft\ExchangeServer\V14\ClientAccessRole to delete the watermark and action key, try to install again. By the way, the Exchange 2010 forum is the right place to seek the solution: http://social.technet.microsoft.com/Forums/en-US/exchange2010/threadsFrank Wang

Hi Alexander, Any updates on your issue?Frank Wang