Hello

I got a problem when creating myDAG, Or putting my servers as DAG Members.

Got 2012 Server Standard and Exchange 2013 on the servers

Witnessserver:2012 Server

EX01: 2012 Standard With Exchange 2013

EX02:2012 Standard with Exchange 2013

Error Message:

error

A server-side database availability group administrative operation failed. Error The operation failed. CreateCluster errors may result from incorrectly configured static addresses. Error: Computer account 'DAG01' couldn't be validated by user 'NT AUTHORITY\SYSTEM'. Error: An attempt to use the specified cluster name failed because an enabled computer object with the given name already exists in the domain. [Server: EX01.contoso.local]
error

The Microsoft Exchange Replication service does not appear to be running on "ex02". Make sure that the server is operating, and that the services can be queried remotely.

What can be wrong? I choose when creating the DAG DHCP IP Address, it's maybe that setting that I need to specify as Static?

The IP-Address that I put in when Creating the DAG is it the network? or the Witnessservers IP?

Thanks Alot!

Hi

Please check if Microsoft Exchange Replication service on EX02 is started.

And also check if cluster name object (CNO) setting is correct.

http://blogs.technet.com/b/manjubn/archive/2013/03/06/exchange2010-add-databaseavailabilitygroupserver-fails-with-error-cluster-api-createcluster-failed-with-0x57.aspx

Database Availability Groups:

http://technet.microsoft.com/en-us/library/dd979799(v=exchg.150).aspx

Is this a fresh install of this DAG with name object 'DAG01'?

Have you verified msExchMDBAvailabilityGroup object in AD to make sure no such name exist in your config container ?

please use adsiedit to verify the name object as below. OR if possible try a different name while creating DAG.

Thanks.

- Did you prestage the computer account ( CNO) first ?

steps here : http://technet.microsoft.com/en-us/library/dd351172(v=exchg.150).aspx

- after prestaging CNO object should be disabled ? is it disabled ?

- if yes, the first node adding to the DAG should have appropriate permissionso n CNO object,

  system account should have full permissionso on CNO object,

- paste the complete permissions of CNO object

Manju