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Skype for Business 2015 Enabling topology error

We have 5 site for skype for business. i am getting below error while installation a new topology to new skype site. I found dupicate pool in ADSI edit, i deleted one which was duplicate. after deletion trying to publish topology but getting an below error

Error: An error occurred: "System.IO.InvalidDataException" "Multiple Active Directory entries were found for type "ms-RTC-SIP-TrustedService" with ID "ajoc-sk.ops.mod,QoS"."

Skype-error.JPG

M A

Hi Pankaj,
Please try the below commands to check.

Import-Module ActiveDirectory

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Get-ItemProperty -Path “AD:\CN=*,CN=Global Settings,CN=RTC Service,CN=Services,CN=Configuration,DC=domain,DC=local” -Name cn,msRTCSIP-TrustedServerFQDN,objectClass,whenChanged | Group-Object -Property msRTCSIP-TrustedServerFQDN | Where-Object {$_.Count -gt 1} | Select-Object -ExpandProperty Group | ?{$_.objectClass -eq “msRTCSIP-TrustedServer”} | Select cn,msRTCSIP-TrustedServerFQDN,whenChanged | ft -AutoSize

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Can you see duplicate entries.
Please check this as well for more details.
https://blogs.technet.microsoft.com/uclobby/2015/06/16/checking-for-ms-rtc-sip-trustedserver-multiple-active-directory-entries-with-powershell/

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Thanks for info.. MAS . I checked this url before but which one is to be delete how to verify that..?

M A

You can delete the one which is created before if it is a new deployment.
You can check by date/time.
You can delete from ADSI.
Note: Please be extremely careful. Take a backup of system state before deletion.

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