Deleting SIP ID from AD

I currently have my office on Office 365 with DirSYNC.

We are rolling out Lync online to users. We used to have Office Communicator and the SIP ID are now a part of the users AD account.

I need to clear the current SIP ID in field msRTCSIP-PrimaryUserAddress. I know how to do this manually and Office Communicator was used a long time ago, but there are about 400 updates I would need to perform.

With DirSYNC the accounts in Office365 are locked out so the changes must be made locally and Synced up to the cloud.

I'm fairly new to scripting, so I am just starting to get the hang of things.

Thanks.
Mike StreettAsked:
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Joshua GrantomSenior Systems AdministratorCommented:
One liner

Import-Module ActiveDirectory ; Get-ADObject -LDAPFilter “(msRTCSIP-PrimaryUserAddress=*)” | ForEach-Object {Set-ADObject -Identity $_.DistinguishedName -Clear “msRTCSIP-PrimaryUserAddress”; “Removed $($_)”}

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Mike StreettAuthor Commented:
This is great, thanks.

Just to be on the safe side what would the command be to just run it on one OU at a time.

Such as C3i TestContainer?
Jeff_SchertzCommented:
Add the following argument after the Get-ADObject cmdlet:

-SearchBase "OU=someOU,DC=contoso,DC=com"

or if it's a default AD container (and not an OU) then:

-SearchBase "CN=Users,DC=contoso,DC=com"
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Joshua GrantomSenior Systems AdministratorCommented:
Sorry about that Mike, I didn't even notice that you asked an additional question, Jeff is correct though.

Import-Module ActiveDirectory ; Get-ADObject -Searchbase "CN=Users,DC=DOMAIN,DC=COM" -LDAPFilter “(msRTCSIP-PrimaryUserAddress=*)” | ForEach-Object {Set-ADObject -Identity $_.DistinguishedName -Clear “msRTCSIP-PrimaryUserAddress”; “Removed $($_)”}

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an easy way to find the searchbase is to right click an OU or container, go to Properties > Attribute Editor, and find the distinguishedName.

In order to see the Attribute Editor, you need to have "Advanced Features" enabled from the View menu in ADUC.
Mike StreettAuthor Commented:
Thanks for the help everyone. It's nice to have some other techies to talk with.
Joshua GrantomSenior Systems AdministratorCommented:
You're welcome Mike,

I know how you feel.
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