Remove Exchange 2013 CAS roles when server is already gone?

Is there a way to remove CAS roles and anything else when the server is already gone?
I have three servers EX1, EX2 and EX3. How can I remove EX2?
Here is what I receive with one PowerShell command.
[PS] C:\Windows\system32>Get-AutoDiscoverVirtualDirectory

Name Server InternalUrl
---- ------ -----------
Autodiscover (Default Web Site) EX1
The task wasn't able to connect to IIS on the server 'EX2.example.local'. Make sure that the server exists and
can be reached from this computer: The RPC server is unavailable.
+ CategoryInfo : ReadError: (EX2\Autodiscover (Default Web Site):ADObjectId) [Get-AutodiscoverVirtualDire
ctory], IISNotReachableException
+ FullyQualifiedErrorId : [Server=EX1,RequestId=351ddc1e-65ff-4555-8e45-7a469fda99e1,TimeStamp=3/26/2017 5:59:41 P
M] [FailureCategory=Cmdlet-IISNotReachableException] 30AB6771,Microsoft.Exchange.Management.SystemConfigurationTas
ks.GetAutodiscoverVirtualDirectory
+ PSComputerName : ex1.example.local

Autodiscover (Default Web Site) EX3

[PS] C:\Windows\system32>

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LVL 48

Adam BrownSenior Systems AdminCommented: 2017-03-26

Yes, but it has to be done in ADSIEdit. https://www.solvps.com/blog/how-to-force-uninstall-remove-exchange-server-2013-adsi-edit/ provides instructions on how to do it.

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Steven HelmsIT SupportAuthor Commented: 2017-03-26

I only want to remove EX2, not all of Exchange. If I can leave it in the config, then I am happy to do so.

Derp. Sorry. Same place in ADSIEdit, go to Services\Microsoft Exchange\<Organization>\Administrative Groups\<Administrative Group>\Servers and delete the server in there.

LVL 18

Jason CrawfordTransport NinjaCommented: 2017-03-26

What does a Get-ExchangeServer show?

LVL 8

PRADIIP SINGHCommented: 2017-03-26

You can remove the Server from ADSIEDIT but just remember this can cause some other issues even later on so best practice would be recover the Server

Recover an Exchange Server
https://technet.microsoft.com/en-us/library/dd876880(v=exchg.141).aspx

And follow
Uninstalling Exchange Server 2010
http://www.careexchange.in/uninstalling-exchange-server-2010/

https://blogs.technet.microsoft.com/mspfe/2015/08/26/decommissioning-legacy-exchange-servers/

In case you don't want to recover the Server and want to remove it from ADSIEDIT then you can follow the steps shared by Adam or below article

http://msexperttalk.com/remove-exchange-server-using-adsi-edit/

Steven HelmsIT SupportAuthor Commented: 2017-03-27

Get-ExchangeServer shows
EX1
EX2
EX3

LVL 19

Delphineous SilverwingGood Ol' GeekCommented: 2017-11-09

No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Split:
-- Adam Brown (https:#a42065603)
-- Adam Brown (https:#a42065652)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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Remove Exchange 2013 CAS roles when server is already gone?

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