Exchange RPC Timeouts when using Citrix NetScaler

Updated 9 June 2016


Exchange 2010

Citrix NetScaler 10.x/11.x


  • Users creating a new email and clicking on To: to browse the Global Address List would receive an Exchange timeout error message.
  • Accepting meeting invites puts the appointment in the recpients calendar but not the organisers and no email gets sent to the organiser of the appectance. Takes clicking the Accept button multiple times before it processes the acceptance.


Create a new TCP Profile


  • System
  • Profiles
  • Add
  • Name: RPC_Profile
  • MSS: 1460
  • Keep-Alive Probes – Enable
  • Connection idle time before sending probe (secs) – 30
  • Keep-alive probe interval (secs) – 20
  • Everything else defaults

Bind this profile to the RPC Load Balanced VIP

  • Traffic Management
  • Load Balancing
  • Virtual Servers
  • <Exchange RPC LB VIP Name>
  • Profiles > Add
  • TCP Profile – Select RPC_Profile
  • Ok
  • Done


add ns tcpProfile RPC_Profile_RPC -mss 1460 -KA ENABLED -KAconnIdleTime 30 -KAprobeInterval 20

add lb vserver <Exchange RPC LB VIP Name> TCP <IP_Address> * -persistenceType SOURCEIP -timeout 150 -cltTimeout 180 -tcpProfileName RPC_Profile


Additional Timeout customization recommendations

  • Add ‘Thresholds & Timeouts node to the RPC ServiceGroup
    • Configure ‘Client Idle Time-out’ setting to: 28800
  • Disable AppFlow on the RPC VIP and ServiceGroup
  • Ensure ‘Surge Protection’ is disabled on the RPC ServiceGroup



Outlook 2010 Search – No Search Results returned


Windows Server 2008 with Terminal Services


Microsoft Office 2010 SP1


You open Outlook 2010 in a Remote Desktop Protocol (RDP) session on a computer that is running Windows Server 2008. When you try to search a string that is included in some email messages in Outlook 2010, no search results are returned.


Apply ‘Outlook 2010 Hotfix‘ August 30, 2011

Outlook 2010 Signature / nk2 files disappear


Windows Server 2008 with Terminal Services

Citrix XenApp


User’s reporting they set their Outlook 2010 signatures but after closing and relaunching Outlook, their signature is gone and needs to be recreated


For XenApp 5 on Windows 2008, apply Hotfix Rollup1 For Citrix XenApp 5.0 for Windows Server 2008.

Though it doesn’t describe the exact issue, the fix is:

Fix #93 – “The CPU consumption of Microsoft Office 2007 applications published using Microsoft App-V on servers running XenApp can increase to 100%”

After applying Hotfix Rollup1 this issue has been resolved.


Outlook 2010 – Mail Desktop Alerts


When running Outlook 2010 as a published application, the Mail Desktop Alert notification doesn’t display or isn’t being displayed in front of the Outlook 2010 window, instead it displays behind the Outlook 2010 window.


This is a known issue with Microsoft Terminal Services – New Mail Desktop Alert notifications are displayed behind the Outlook 2010 window when you run Outlook 2010 as a Terminal Services application

UPDATE: This issue has now been resolved – Apply the following fix



Create a custom rule within Outlook 2010