James Denne

Hello Community, My name is James Denne. I am a Technical Relationship Manager (TRM) based in the UK. As a TRM I provide direct technical support and technical account management to a small number of Enterprise customers. I hope you enjoy my blogs. Best regards, James
  1. Limiting a user to 2 instances of an application

    Recently a UK TRM customer posed  a question to their TRM: "I need to limit our users to running two instances of a particular application.  How can I do this?" There was quite a bit of head-scratching in the team about how to do this… load evaluator? some sort of policy? Could the option to limit users to 1 instance of the application be adjusted to limit a user to ...

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  2. Some XenApp 6.5 ZDC Replication Calculations

    With the approaching end of life date for XenApp 5, one of my customers is currently designing their XenApp 6.5 farm and asked for some assistance calculating the amount of data that would be replicated between each zone data collector.   Let's detail the existing environment: XenApp 5 Feature Pack 2 Hotfix Rollup Pack 7 350 servers 14 zones in 10 countries globally. Core farm infrastructure (SQL publisher datastore, licence server) located ...

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  3. Creating a custom Event Log to assist with troubleshooting

    When a Windows XP VDA registers there are just a few key events the administrator needs to look for in the event log, and these are normally visible easily in a single Eventvwr window.  Windows 7 is much more heavily instrumented than XP, and while that is a good thing for troubleshooting, sometimes it can make the wood hard to see through the trees: I had ...

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  4. Fixing Tainted AD Accounts in XenDesktop 5

    I have been doing more work this week with a customer XenDesktop 5 environment which I referred to in a previous post. This week we have been looking at why some Active Directory accounts were showing as "Tainted" in Desktop Studio, and how we could fix this.  I was able to reproduce this in our lab so I can show you how to re-produce this scenario and how to ...

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  5. XenDesktop 5 – The provisioning task is already running on the catalog

    Hello Community, I have just finished working on a XenDesktop 5 error for one of my customers, and as usual, wanted to share the troubleshooting process with you. Customer Environment A high-level view of the customer's environment is: XenDesktop 5 SP1 as the broker 2 DDCs in the XD5 site VMware ESX 4 hosting the DDCs and virtual desktops. Approximately 180 Windows 7 virtual desktops in the primary production desktop catalog Two small ...

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  6. XenDesktop 4, Scripting and the Local Host Cache

    I recently worked with a customer who suffered an IMA service failure in their XenDesktop 4 farm.  The troubleshooting process taught me number of things about XenDesktop, and I wanted to share our findings for the benefit of other XenDesktop 4 customers. Customer Environment This customer has a medium-sized XenDesktop deployment.  The customer environment is: VMware vSphere 4 hosting DDCs and VDAs DDCs are Windows Server 2003 32-bit XenDesktop 4 ...

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  7. Making sense of XenDesktop 4 Hotfixes

    Hello Community, I am currently working on a support case for a customer who has experienced several service outages in their XenDesktop 4 deployment over the past month. We are still in the middle of investigating the root cause of the service outages, so I will not go into these issues in this post.  However, the customer asked for a summary of the current hotfix status of ...

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  8. Publishing Internet Explorer in Explorer mode

    A case was recently logged by one of my customers about problems with Windows Explorer as a published app.  Here is the problem description which I have copied from the case verbatim: “Customer tried to publish Internet 7 Explorer with the -e switch as a Windows Explorer replacement as per CTX922603 but this switch has been deprecated in IE7. Customer then tried to publish Windows ...

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  9. DSMAINT RECREATELHC and Replicated IMA Datastores

    Before I joined Citrix I worked in Infrastructure Support for a large UK financial services company. When we recruited new members of the team we gave each candidate a technical test covering the technologies the team supported; AD, DNS, WINS, DHCP, Clustering, Citrix, VMware etc etc etc. The objective of the test was to measure a candidate's technical ability and in particular to ...

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  10. Troubleshooting a XenDesktop “boot storm” issue, part 3

    In Part 1 of this series I discussed the changes we made to control the load placed on the hypervisor by the XenDesktop pool management service. In Part 2 I described the changes we made to lock down certain roles within the XenDesktop farm to provide a more stable and predictable farm. As always with these kinds of investigations after clearing the major changes out the ...

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