Remove SIP Information from AD accounts

At one point in time we had a working OCS 2007 server.  That server got formatted and used for a different purpose.  I have since setup a new LCS 2005 server (due to licensing and other issues we are going to stick with LCS 05 for now instead of going back to OCS 07).

I have several legacy users that were here when we had OCS 2007 and their SIP data is still set for the old pool.  Because of this AD will not let me add them to the new pool.  What do I need to do to remedy this.

Also, when I attempt to start the archiving service I receive the following error:
Live Communications Archiving Service Snap-in cannot start the Service.  Try again.

Trying again of course results in the same error message.
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Are you able to right-click on the users in AD and select the "Delete Communications Server users" option if you install the administrative tools on your own PC with the Administration tools altready installed?



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You need to rip out all the old OCS 2007 schema stuff

Here you go: -

You can download the OCS 2007 Administration guide from the following link as it has the instructions.
You'll also need the OCS 2007 Command Line Reference Guide

Basically you need to deactivate all server roles either through the GUI or using LCSCMD from the command line.
Then unprep the Domain and unprep the forest to remove all OCS entries.
LCSCmd.exe /Domain[:<Domain FQDN>] /Action:DomainUnPrep
LCSCmd.exe /Forest[:<forest FQDN>] /Action:ForestUnprep

(taken from
LouSch7Author Commented:
Was not aware of that option...yes, I can do that thank you very much
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