Joining existing site servers to hierarchy?

[speedy]

Dear all our environment look like this 

• 1 CAS server SCCM 2012 R2 
• 2 stand alone primary site's SCCM 2012 R2 
• 1 stand alone primary site SCCM current branch 1610 

we need to joining all primary sites to CAS

is it possible and how we can do it ?

i really appreciate your help and support

regards,

[GarthMJ]

As you already know from your others post on TechNet, No you can't do this.

You only need a CAS if you have others 150,000 computers.

Since you have a CMCB primary site, use that and migrate all of your clients to it.  Save yourself the headache of a CAS.

[speedy]

thank you Garth MJ this is my opinion also

 i will save my time and headache