Sorry for not making the scenario clear.

2-CAS/HUB in site A (LB)
2-MBX in Site A (DAG)
2-CAS/HUB in site B (LB)
2-MBX in Site B (DAG)

Enabled pop3 on one CAS ServerA in Site A

Client is in Site B connecting via POP3, but the logs show the connection going to CAS ServerB

We just want to enable POP3 on one of the CAS Servers (CAS ServerA) within Site A, so any other future POP3 connections regardless of the site will connect to that CAS Server within Site A

Is this possible?

Thanks Eric

Ignore the CAS Array, it’s not relevant to POP connections.

I’m trying to understand your scenario. Are they dedicated CAS, or multi-role? Are they all in the same site?

Why not just enable POP on all CAS and load balance the traffic anyway?

There is a load balancer in place, with two CAS Servers within the CAS array. I have enabled POP3 on only one of the CAS Servers within the ARRAY itself, and I point the pop client directly to that POP3 Server. Doing it like this the Client is unable to connect, only when I enable POP3 on the other CAS Server within the ARRAY it works.

Ultimately I am trying to bypass the LB and the Array and go directly to one of the two CAS Servers.

Are you using a load balancer?

Hi Paul,

I have several CAS Servers in the environment (2010), enable POP3 on a specific CAS server does not work, after enabling POP3 logging I see in the log that it is redirecting the traffic to another CAs Server? Enabling the CAS server in the log, then the pop3 client starts to function. Am I not seeing something properly here?

For Exchange 2010? You can enable it on a single CAS if you want to.

If we have multiple CAS servers within the Org can we enable pop3 on just one of them and have the person(s) connect to that one specifically or we would have to do this on all of them in the Org?

Regards,
Eric

Are you trying to connect from your iPhone to Exchange using POP? Why not just use ActiveSync?

Sounds like your client hasn’t been configured correctly.