Hello everyone,  I am in the middle of testing a 2003 to 2012 domain controller migration.  I have cloned our 2 current 2003 DC's and spun up 2 additional 2012 DCs, all of this in an isolated virtual environment.  I have transferred all roles to the 2012 DC's, everything went fine.  I am now at the point of demoting the 2003 DC's, during the dcpromo process I am prompted with "This domain controller holds the last replica of the following application directory partitions:  DC=TAPI3Directory,DC=xxx,DC=local.  I understand that TAPI3 is used for telephony that relies on AD.  I cannot get a clear answer (recent turnover) whether we actually need this.  My question is, how can I copy/replicate/move or re-create this Application Directory Partition on a Server 2012 DC?  Everything I research leads to tapicfg but this is not a valid command in server 2012.   If there is a way to do this can someone please explain?

Thanks for your time.

Damien

Greetings,

                 I see that the the distinguished name mentioned "DC=TAPI3Directory,DC=xxx,DC=local" to be the domain's distinguished name. Can you confirm whether the same is the domain's partition or a standalone application partition created for a different purpose.

If it is a standalone application partition, then you have use the DNSCMD to move the application partition to the newly created partition.

This link will definetly help you out in your quest to create / store the data to a different application partition.

https://technet.microsoft.com/en-us/library/cc784399%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396

Thanks

Eric

• Proposed as answer by Eric Anto MCITP 30 minutes ago