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Exchange 2010 Active Directory Error 0x51..

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  • Exchange 2010 Active Directory Error 0x51..

    I have two domain controllers one was server 2012 and other is 2008 R2 both are global catalog servers. My 1st one got crashed due to virus infection i.e server 2012, so i deleted its name from Active directory users & from Site & services manually and then reinstalled my domain controller and ran dcpromo added to my domain. Now I opened my exchange server and got the above error. Please help me what to do? I tried to remove exchange console file and also select "use default Domain controller" but didn't help, my exchange still looking for "main.tabanis.net" server which is no more. Please help... Below is the error
    Active Directory Error 0x51 occurred when trying to check the suitability of server '<mains.tabanis.net>'. Error: 'Active directory response: The LDAP server is unavailable


  • #2
    Did you do a full metadata cleanup?
    Deleting from ADSS is not enough
    Tom Jones
    MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
    PhD, MSc, FIAP, MIITT
    IT Trainer / Consultant
    Ossian Ltd
    Scotland

    ** Remember to give credit where credit is due and leave reputation points where appropriate **

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    • #3
      solved it, I had few orphaned references in my DNS records, I just washed them out. My exchange got worked Thanks anyways

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