Microsoft Outlook Disconnect error

[Zayar Win]

After I change the link from Satellite link to MPLS L2 VPN  between HQ and remote site , I got more bandwidth ,even though I have got outlook disconnect error.I am finding the root cause in Firewall, exchange server, and client PC. I can't decide the root cause. I have packet capture and please advice me.

Thank You...

[Robert Sherwin]

How or where does this fit in with Cisco Email Security?  Need a little more info in order to assist...

[Zayar Win]

I am using Cisco Products in end to end but except Firewall and I don't know which product are using in ISP. I am not sure where can I get assist. So, I arrive to this Email security blog. :)

I am suspecting MTU size on Link or exchange server issue . I am sure that  for exchange server I have to go Microsoft Support Site. So . could you please suggest where I should move this topic.

Thank You

[Zayar Win · Accepted solution]

Dear All,

I have got solution. It is happening on MTU size. Because of I only got MTU 1450 on new link . I have discussed with ISP , after that I got 1472 and issue was solved.

If you face same issue you can also try this scenario.

Cheer !!

[Robert Sherwin]

Super, good to hear!  I'll mark this as answered with your post.  Appreciate the follow-up and continued info-sharing!