TECH

I finished my Exchange 2007 roll out and things are pretty much settled now. One issue that I did have thats worth noting was when I was trying to remove the 2007 frontend server I had put it. I couldnt get CAS installed onto the mailbox server. Here is a description of the problem I posted on the newsgroups and the response I got in bold at the end.. which fixed the issue.

I am having problems installing the Client Access Server to our Exchange
2007 server. The server currently runs the Mailbox and Hub Transport roles.

After I tick the Client Access Server box in setup it does a pre requisite
check and passes. It then proceeds to install CAS. It fails part way
through this with the error.

Read only MultiValluedProperty does not support this operation.

The server does show itself as having the CAS role installed in the Exchange
Management Console but things like the POP3 and IMAP services are missing.
It lets me uninstall CAS with no problems.

A bit more info may help. The server that I am trying to install CAS on was
the only Exchange 2007 which was installed into a 2003 org. I was having
problems with OWA and getting it to proxy users that were still on 2003.
After a bit of digging I found that running the CAS on the same server as
the Mailbox server wasnt going to work so during the migration I built
another 2007 server and put just the CAS role on that. This sorted the
problem. We are now finished with the migration and 2003 has been removed.
I am now trying to get rid of the temporary CAS server so I can go back to
having just one server but until I can get the CAS onto the mailbox server I
cant remove the temporary server.

Anyone got any ideas please? I have attached the last part of the DR Watson
Dump

[02/02/2007 00:23:23] [2] [WARNING] An unexpected error has occurred and a
Watson dump is being generated: Read only MultiValuedProperty does not
support this operation.
[02/02/2007 00:23:23] [2] [ERROR] Read only MultiValuedProperty does not
support this operation.
[02/02/2007 00:23:51] [2] [WARNING] An unexpected error has occurred and a
Watson dump is being generated: The pipeline has been stopped.
[02/02/2007 00:23:51] [1] Exception :
System.Management.Automation.CmdletInvocationException: Read only
MultiValuedProperty does not support this operation. --->
System.InvalidOperationException: Read only MultiValuedProperty does not
support this operation.
at Microsoft.Exchange.Data.MultiValuedProperty`1.Add(T item)
at
Microsoft.Exchange.Management.Deployment.EnableOabWebDistribution.InternalProcessRecord()
at Microsoft.Exchange.Configuration.Tasks.Task.ProcessRecord()
at System.Management.Automation.Cmdlet.DoProcessRecord()
at System.Management.Automation.CommandProcessor.ProcessRecord()
--- End of inner exception stack trace ---
at
System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object
input, Hashtable errorResults, Boolean enumerate)
at System.Management.Automation.Parser.PipelineNode.Execute(Array input,
Pipe outputPipe, ArrayList& resultList)
at System.Management.Automation.Parser.StatementListNode.Execute(Array
input, Pipe outputPipe, ArrayList& resultList)
[02/02/2007 00:23:51] [1] [WARNING] An unexpected error has occurred and a
Watson dump is being generated: Read only MultiValuedProperty does not
support this operation.
[02/02/2007 00:23:51] [1] [ERROR] Read only MultiValuedProperty does not
support this operation.
[02/02/2007 00:23:51] [1] [ERROR] Read only MultiValuedProperty does not
support this operation.

You should be able to resolve this issue using Adsiedit. Navigate to
Configuration > CN=Services > CN=Microsoft Exchange > CN=(your Exchange org
name) > CN=Address list container > CN=Offline address list. In the right
pane right-click on the CN=default OAB and go to Properties. Locate the
value MsExchVersion. If that is not set, set the value to 4535486012416.

Hope this helps.