Lync Server 2013 Forest Prep Issue - Task execution failed (Object reference not set to an instance of an object)

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Several times while preparing the AD Forest, we run into an issue during the preparation process. This is mostly with a new installation.

You will receive an preparation failed error regardles if you chose the wizard or the Enable-CsAdForest command.
It failes with:

Prepare Forest Active Directory setting exection failed on an unrecoverable error
Command execution failed: Value cannot be null.
Parameter name: InstanceToDelete




This is an wellknow issue in the installation process.

Solution:
you must use the PowerShell command
Enable-CsAdForest -GroupDomain <AD Domain FQDN> -GroupDomainController <DC FQDN> -GobalCatalog <GC FQDN>




Comments

  1. UnknownSeptember 24, 2014 at 7:29 PM

    Thanks for the Post !!! It worked and resolved my issue.
    small correction with your powershell: spelling of "Global"

    ReplyDelete
  2. JNovember 3, 2015 at 4:02 PM

    I just stumbled across your Blog a few weeks ago and it has been an invaluable resource. I used this fix for my greenfield Skype for Business 2015 install. Thank you sir.

    ReplyDelete

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