Exchange Connectivity possible network delay?

Hi all,

I have a client 10.230.190.20 and an Exchange Server 10.2.1.3.

I would like someone to review the attached wireshark captures as to me it looks as though that there is a delay in the client recieving SYN,ACK packets from the Exchange server so the Client sends a FIN and then the whole process repeats itself.

My question is that if this were network delay, why is the first part of the MAPI process no affected at all and those packets are larger in size?

I am no exchange expert so I am unsure if this is an Exchange or a network issue.

One capture is from the client and the other capture is from the egress interface of our Cisco router.

Thanks!

Mario