FSLogix Containers – Search Index Considerations and Troubleshooting

Posted by James Kindon on Jul 11, 2018 11:10:40 AM

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Co-authored by James Kindon (@james_kindon) Gareth Carson (@CitXen) James Rankin (@james____rankin) Nigel Woods (@NigelWoods27)

Windows Search is a feature that has existed in the Windows OS since Windows Vista, although it did exist as freeware called Windows Desktop Search for XP and Server 2003. It replaced the Indexing Service that first arrived as part of the Windows NT4 Option Pack, which was deprecated in Windows 7 and finally removed in Windows 8.

Windows Search builds a full-text index of files on a device. The time required for the initial creation of this index depends on the amount and type of data to be indexed and can take up to several hours. In persistent environments, this does not present a problem, as the creation of the index is a one-time event. However, in non-persistent RDSH or VDI environments like XenApp and XenDesktop, this can present an issue.

Also, the Search database is normally placed in a device-specific area - C:\ProgramData\Microsoft\Search\Data\Applications\Windows\Windows.edb. As well as being shared amongst users, it can also grow very large in some situations. Trying to “roam” this data by redirecting the Registry or using symbolic links can be very difficult, as Search is not intended to be used from networked locations. All of these issues are the drivers behind the FSLogix feature which allows you to mount the Search database to a VHD – Search Roaming.

Whilst it normally “just works”, we decided to put this post together in an attempt to help clarify how the search roaming feature of FSLogix fits together, and how you can troubleshoot not only initial configurations, but issues that may arise within everyday use.

Search Modes

FSLogix offers two modes of Search Roaming, Single User Search and Multi User Search. Let’s start by clarifying the two modes that you may come across when using FSLogix Profile Containers or Office365 Containers.

Single User Search

Single User Search roams the entire Search Database in the user’s Profile Container or Office 365 Container. So the .edb file from the ProgramData folder is mounted into either the user’s Profile Container or Office365 Container. The redirected .edb and the necessary files to support search are stored in the \WSearch folder in the VHD(X).

Roaming the Windows Search database means that Windows Search is available immediately after logon and no re-indexing needs to take place.


  • Supported on Windows 7 and later and Server 2008 R2 and later
  • Requires an Office 365 Container Licence

Multi User Search

Multi User Search moves the user portion of the search index out and stores it in the users Profile Container or Office 365 Container. This uses FSLogix’s secret sauce to capture the user-specific portion of the .edb file, which handles Outlook searching, and mount it into the Profile Container or Office365 Container as appropriate. The user specific portion of the .edb and the necessary files to support search are stored in the \WSearch folder in the VHD(X).


This feature allows roaming a user's Outlook Search information. This feature can be used on single-user (XenDesktop, VDI, etc.) or multi-user systems (RDSH, XenApp, etc.) but only the Outlook email Search information is roamed.


  • Supported on Windows 8 and later, Windows Server 2012 R2 and later, both 32 and 64 bit
  • Supports Outlook 2010 and later
  • Requires an Office 365 Container Licence

Search Roaming Dependencies

For roaming to successfully occur, the following dependencies exist:

  • Windows Search Service is started, set to automatic. Do not set delayed start. Also, pay attention to the section “Operating System Considerations” to understand any potential differences between “Search service” and “Search service feature”
  • Provisioning Server Optimization disables this service - use a GPO to revert this setting and enforce the search service to start. I have a feature request in with BIS-F dev team to assist with this
  • Office 365 Container Licence – The FSLogix Office 365 Container is a subset of the FSLogix Profile Container feature plus the ability (if acquired) to roam the Windows Search databasewith the user.  Office 365 Containers solve the issues that Office 365 has in a roaming profile environment.  Office 365 Containers can be used with any 3rd party profile solution

Windows Search – Operating System Considerations

There is an important distinction to be made when dealing with the terminology surrounding the term "Windows Search" as there are some notable differences across operating system versions within the Microsoft stack, particularly on Server operating systems.

Windows 7/8/8.1/10

Client operating systems are simple enough, the Windows Search service simply needs to be running and set to Automatic start. This configuration is for Single User search only

Windows Search Properties

Windows Server 2008 R2
On 2008 R2, there are two File Services roles available, the “Indexing Service” and the “Windows Search Service”. These could not be installed on the same machine. The “Indexing Service” merely installed a service named the same.

The “Windows Search Service” did, well, nothing that we could see. The indication was that it allowed clients to do fast searches of server shares. The description, as you can see below, indicates that it isn’t intended for enterprise scenarios.

Add Role Services

FSLogix does not have the ability to roam search when utilising containers against Server 2008 R2. Technically, FSLogix can support single-user search only on Windows Server 2008 R2, but as you can imagine, this use case is limited specifically to DaaS providers who provide Windows Server 2008 R2 instances on a one-to-one basis, and not for RDSH or XenApp.

Windows Server 2012 R2
On 2012 R2, you need to install the “feature” to enable the “service”. Without the feature, the service doesn’t exist. The two are one and the same on this OS.

Install the “feature”, and the “Windows Search" service appears in services.msc. The old “Indexing Service” does not exist at all.

Windows Search Service


Windows Server 2016

On Server 2016, however, the “indexing service” is now called the “Windows Search” service and is installed by default (although disabled).

If you enable the service and start it, indexing begins. Also, when started it also allows clients (even Windows 7 clients) to access the index and do file content searches of shares on the server.

However, there is still the “Windows Search Service” feature which you can install from Server Manager, and this does not enable the service, and even when installed, the index still shows as “not running” when you do a search (however, if you have the “Windows Search” service (service, not feature!) set to Manual, it will auto-start the service when you do a search).

Windows PowerShell

Windows Search Properties

To summarise the above into simple terms, below is what you will need to action per Operating System for Multi User Search

FSLogix Multi Search OS Configuration




Windows Server 2008 R2



Windows Server 2012 R2


Install Windows Search feature and enable the service accordingly

Windows Server 2016


Enable the Windows Search service (the “service” not the “feature”)


Microsoft Office Considerations

When dealing with Outlook Indexing, there are a few things to take note of:

  • Office must be installed whilst the Search Service is running, else the search components for outlook will be missing
  • If you are retro fitting Windows Search into an already existing environment, then you will need a full office repair to have the search capability enabled and operational from an office perspective

Enabling Search Roaming

Believe it or not, this one is a common miss. There are numerous ways to enable all settings with FSLogix, either via an ADMX file (GPO) which is a combination of native ADMX capability and simple registry stamping, or native registry entries, see my post here around configuration options https://jkindon.com/2018/02/20/getting-to-know-fslogix-containers/. Ideally you are using the latest ADMX (and latest FSLogix release of course with all the patches….) and have enabled search roaming in all the appropriate locations

Turn it on and note that you also have to configure the appropriate location to store the database


For Office 365 Containers

Office 365 Containers

And for Profile Containers

Profile Containers

Note that we will discuss the differences in behaviours and considerations around when you are using both containers together shortly

Note that if you misconfigure or do not configure these settings, your log file will clearly tell you what's going on


Log Files

FSLogix provides full detailed logging out of the box for all operations. You just need to know where to find these log files, by default they are stored in the following location on each endpoint



The logs we are interested in for this post are obviously the Search Logs, however depending on your deployment and use of containers, you will also be interested in the ODFC (365 containers) and the Profile logs at a minimum.

These logs can all be passed utilising your choice of log viewer (Notepad++ anyone?) or there is a very handy little utility called FRXTray.exe (It will launch direct to your notification area). You will be presented with a basic view to start with, click advanced to get the goods



Two important points at this stage

  1. The log viewer doesn't (at time of writing) show you the Search based logs - you need to parse these manually
  2. The traffic light indicator will function in the following way
    1. No Containers Active = RED
    2. Office 365 Container Only = Yellow
    3. Profile Containers = Green

The utility by default Is found here: C:\Program Files\FSLogix\Apps\frxtray.exe and we like to as a practice make it available on logon using something like Citrix WEM, or at least have it published and available in the users start menu.

A good example of a working search catalog mount will be shown as follows:


The above process shows the following successful tasks

  1. Confirming Multi User Search Configuration
  2. When the User Logs in, the container is mounted, and the search mount process begins. We can see that a database is found for the user, and the catalog is successfully mounted
  3. A basic ICACLS permissions reset is performed on the WSearch Index location
  4. When the user logs off, the catalog is gracefully dismounted

Now in contrast, let's look at a broken request


Here we can see some pretty nice problems

  1. The search database is located in the container, however
  2. It cannot be mounted for some reason - this is the great unknown in some of these deployments. What happened to the index to break it so that FSLogix cannot mount it?
  3. Despite the fact that the catalog fails to mount, a basic ICACLS is again run on the WSearch folder to grant the user full permissions

It's once you have seen this behaviour or set of problems that you start looking at the actual index files being a problem. As you can already tell above, the index mounts for one user, so you know configurations are OK, Outlook should be happy, and all your enablement policies are configured OK

Multi-Container Behaviour

The behaviour of where the search database can be stored is configurable by the admin when both Profile Containers and Office 365 Containers are in play

Single User Search

If both the FSLogix Profile Container feature and the Office 365 Container feature are configured to have the Search database, the system will put the database into the Profile container by default

The admin is able to specify either the Profile container or the O365 container where the Search database will be stored.


Multi User Search

It is possible to choose where the search Database is stored for Multi User Environments, it can be stored in either the Profile Container or the Office 365 Container.


When multi user search is enabled, the following registry value is changed from “0” to “1”

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Search\Preferences\EnablePerUserCatalog(REG_DWORD)


Resetting the Search Index

Being what it is, the search index may corrupt over its lifetime for a myriad of reasons… locations not being available (rare), permissions corruptions, upgrades to the search service due to patches etc. It's quite daunting trying to figure out what is what and how to reset things. You have a couple of options

FSLogix FRX reset tool

This utility is designed to queue a windows-based search reindex for the specified user when using multi user search.

frx reset-user-search-db -user domain\user

Manual reset. (hammer approach) This approach involves the process of mounting the users profile disk using the FSLogix Context Menu Handler tool "C:\Program Files\FSLogix\Apps\frxcontext.exe" and manually trawling through to locate and kill the search index files which are stored here “%AppData%\Roaming\FSlogix\WSearch” when multi user search is enabled

FSLogix Context Menu Handler

First you must install this utility using the command “frxcontext.exe –install


This now allows the mounting of the VHD/VHDX file via the right click context menu using the Mount for FSLogix Edit option (The VHD(X) must not be in use otherwise it cannot be mounted). This will mount both the container into windows explorer, and the registry hive contained with the container


An alternate way to mount the VHDX files is to use Disk Management and click on Action and Attach VHD. Make sure the VHD/VHDX file is not in use


Once this is mounted you can see it as a disk in Disk Management


You need to assign a drive letter and path in order to access the content of the newly attached drive.

Remember to unassign the drive before mounting otherwise FSLogix will see it as a corrupt Container.

Now you can view the VHDX and access it within Windows Explorer as below:

Mounted Office 365 Container Contents



Mounted VHDX viewing the Windows Search files relating to Outlook


Asking Outlook to have a crack at rebuilding the index for you.

This of course assumed that you are in a position where you can reach the index…if you cannot, then you are probably reading this article


Some things to be aware of around resetting the search indexes:

  • The search feature will not work temporarily, while index rebuilding operation is in the process. It is recommended not to interfere with the application during the process.
  • The time duration it takes to rebuild indexes solely depends on system specifications, the number of files to be indexed and volume of data each file incorporates.
  • Once the process to rebuild indexes is completed successfully, restart the application and check ‘Search’ functionality.


Confirming the Index

When your index is happily working and roaming, you should be in a position where your index according to outlook looks like the below (0 items to be indexed).



If you are experience degradation of search or index performance as a whole, then most likely you will see that your index is constantly rebuilding. This indicates problems with roaming the index, or some sort of index corruption

Known Issues / Scenarios that are troublesome

In the field to date there have been a few things that are nasty and have bitten us. A few things to watch for are

  • Redirected Search via GPO based Folder Redirections. Don't do this, it tends to be quite problematic when you have redirected search indexes via Shell Folder (Folder Redirection) and then you throw containers in the mix. If you see redirected searches, turn them off and be done with them
  • Redirected Start Menu. If you are redirecting modern Start Menus then you are already broken in one way or another. Don't do this. By default, the Start Menu is also indexed by the Windows Search service, and if it's been configured as redirected you are already behind the eight ball.

Any decent profile management solution these days should be able to roam the Start Menu appropriately (let's not go to deep there though as that’s a can of worms) and if you have full profile Containers then instant win. One gotcha here, is that if you have previously been redirecting the start menu via GPO/Shell Folders, you cannot simply set back to "Not Configured", you need to set the policy setting to “Redirect to the local userprofile location”



  • It is ideal to have your FSLogix Registry/GPO settings baked into your master images. Trying to retrofit these values in non-persistent VDI or RDSH environments can prove a challenge due to how quickly the FSLogix Service starts and reads existing value. If you cannot do this, and you experience configuration problems (you say ON, FSLogix actions OFF, Environment reflects your value of ON) then you should consider restarting the FSLogix Service shortly after Start Up as there is a good chance your image has the wrong value baked in
  • Other plug-ins can stop Search working. We have had a number of instances where a plug-in has stopped the search service. Symantec Enterprise Vault Client has been a particular problem.
  • Make sure Outlook is fully patched as there are a number of search related fixes and optimisations in the patches
  • When checking the status of the search items indexed you will see the “items remain to be indexed” number increase to start with when first caching a mailbox as it has more to index. You will then see this figure slowly reduce but it can take several minutes to be fully indexed.

A real-life example of troubleshooting (Gareth)

With all these things in mind, here’s a real-life example of the Search indexing feature in use and how we used the above information to troubleshoot the problem effectively.

Gareth recently had a problem with Search indexing within an FSLogix solution and set about troubleshooting it with James K’s help. Despite the fact that James doesn’t look anywhere near as good in hot pants as Gareth’s favourite Australian, Kylie Minogue, he reluctantly agreed to accept the offer of assistance 😊

Here’s a rundown of what was done to resolve the issue.

Setting the Scene

The scenario that presented itself was a bit ambiguous and unclear. What was known was that the search index appeared to be non-functional for specific users configured identically to working users. Consistently, the noisy users were complaining they had to keep rebuilding the search Index and this was negatively affecting the performance of their systems and their overall productivity.

The Environment

The environment in question was a Citrix XenApp 7.15 LTSR CU2 build, utilising 2012 R2 VDAs and Windows Server 2016 Infrastructure Servers (WEM/Brokers/File Servers etc). FSLogix was being utilised as the profile solution utilising both profile containers for the individual users with no folder redirection, and office 365 containers used to house Office 365 data inclusive of Search index.

FSLogix Configuration

At the OU level we had a single policy utilising FSLogix ADMX files configured for our XenApp VDAs.

High Level Troubleshooting Steps

  • Confirmed Configuration Settings via GPO
  • Confirmed Permissions on the FSLogix Shares
  • Confirmed Profile and 365 Container Operations
  • Published the FRXTray.exe to the troublesome user via WEM and confirmed no significant errors relating to the mounting and write operations
  • Identified some issues around Start Menu redirection – resolved these via redirecting start menu back to original location
  • Investigated the C:\ProgramData\FSLogix\Logs\Search Logs, identified corrupted and problematic search catalog mounts for the user in question
  • Attempted to repair the search index via the frx.exe utility – no luck
  • Disconnected User to ensure containers released
  • Mounted the VHDX containers and noted that both containers contained search index references – manually deleted all the search index files from within both containers
  • Removed any outlook search references from the Outlook folders within the containers, and took the chance to clean any duplicate OST files
  • Dismounted the VHDX containers
  • Logged the user back in, checked the Logs and can confirm that no existing index found, a new one being built for the user
  • Confirmed outlook using the existing OST file, and now rebuilding an index
  • Allowed operations to complete, logged off user and started a new session
  • Confirmed that indexing operational and roaming OK

Reason for Approach

If using a full container, you must remember that deleting the container will mean the user loses all contents within the container. Unless you have a full backup VHDX solution in place you should be very careful when doing this.

Some environments will redirect the documents folder outside the container to a folder redirection share that can be backed up for this purpose. My advice is always to rename the container, so you have a copy just in case.

Understanding how the index can be tracked and fixed allowed an optimal result without having to perform the traditional “Reset your profile” to fix a single issue.


If you’ve configured your FSLogix Search Roaming solution correctly, then there’s absolutely no reason why it shouldn’t just work and keep on working.

However, as we’ve found out, troubleshooting the actual Search feature itself can be a bit daunting, as there are many different configurations of products and operating systems that can make use of this feature. That’s why we thought it was important to put together a blog post showing the steps that we commonly take around addressing issues with Search Roaming, and also to allow administrators to better understand the technologies they are dealing with.

As with many Microsoft features, Windows Search is not greatly documented, particularly when it comes to the differences between operating system functionality. However, there is a substantial amount of developer documentation around integration with Windows Search, so the current iteration of this feature hopefully will be around in its current form, or something very close to it, for a good while yet.

Anyway, here’s hoping you find this compilation of our shared experiences helpful in troubleshooting your own environments – any questions or queries, please feel free to leave a comment or hit us up on Twitter.

Topics: VDI, XenDesktop, XenApp, RDSH, profile containers, Office 365, Outlook, FSLogix Office 365 Container, Windows Search, Windows Server

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