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OWA needs >1 minute to show mailbox

Started by Carsten Remien , 08 April 2017 - 02:22 PM
3 replies to this topic

Best Answer Paul Blitz , 12 April 2017 - 09:55 AM

There is a known issue with slow SSL performance, cause by the TCP not being aggressive enough, fixed with a TCP profile

 

details here: https://support.citrix.com/article/CTX207005

Carsten Remien Members

Carsten Remien
  • 14 posts

Posted 08 April 2017 - 02:22 PM

Hi,

 

we are using NetScaler 11.1.50.10 with Unified Gateway and a bookmark for OWA access. The bookmark uses a own unnumbered vServer just for OWA, the bookmark does not use CVPN rewriting. The URL would be for the user https://<UnifiedGatewayURL>/owa.

NetScaler is doing SSO to the OWA Portal.

Sometimes everything is fine, but sometimes it takes more than a minute until the users seeing they inbox. Until then, they see the OWA message "Ist in Arbeit" (I think the english translation would be "is in progress".

Direct access to OWA is fast, the load / amount of sessions through the NetScaler is very low (<5 users), because at this time, it is only visible for a testgroup.

 

Have anyone an idea?

Could a TCP Profile fix it?

We are using also TLS ECDHE AES, and pure AES Cphers, without GCM.

Our NetScaler MPX7500 and VPX10 have these issues, both running the same software version.

 

Best Regards,

Carsten



Paul Blitz Members

Paul Blitz
  • 4,004 posts

Posted 12 April 2017 - 09:55 AM

There is a known issue with slow SSL performance, cause by the TCP not being aggressive enough, fixed with a TCP profile

 

details here: https://support.citrix.com/article/CTX207005


Best Answer Helpful Answer

Carsten Remien Members

Carsten Remien
  • 14 posts

Posted 13 April 2017 - 12:16 PM

Thanks a lot Paul,

that fixed the issue.

I have previously tried the LFP profile (long fat pipe), but this one is much better.

 

Best Regards,

Carsten



Paul Blitz Members

Paul Blitz
  • 4,004 posts

Posted 18 April 2017 - 04:19 PM

Oh, excellent news!