problem removing exchange 2007 cas role

im trying to remove my exchange 2007 server
everything has been moved to 2010 and the server is ready to be removed
i removed a role at a time,
now i only have the cas role to remove
however i must have removed these roles in the wrong order becauase now when i try to remove the cas role
i receive the following error

error
exchange server server.com was not found please make sure you typed it correctly

how can i cleanly remove this last role
LVL 1
dougdogAsked:
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Mahesh SharmaCommented:
Check if this applies to your problem:
http://support.microsoft.com/kb/926311
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dougdogAuthor Commented:
im not running any other 2007 server
im running 2010
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Sumit GuptaSystem and Virtualization EngineerCommented:
You just need to remove the CAS server from your NLB cluster.  I'm assuming you are using NLB.  If you are using some other sort of load balancer, then use it and remove the server from the array.  Here is a link and a blurb to help you:

 http://technet.microsoft.com/en-us/library/cc733098.aspx

To remove a host or all hosts from a Network Load Balancing cluster

To open NLB Manager, click Start, click Administrative Tools, and then click Network Load Balancing Manager. You can also open NLB Manager by typing Nlbmgr at a command prompt.

If Network Load Balancing Manager does not list the cluster, connect to the cluster.

To remove a single host, right-click the host on which you want to disable Network Load Balancing, and click Delete Host.
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dougdogAuthor Commented:
removing the watremark registry entries solved this problem
once i removed the watermark registry keys i was able to cleanly remove exchange
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dougdogAuthor Commented:
this was the solution
the other suggestions were not relevant
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