What is it for?
The Captisium Universal File Handler Client-Side Application is loaded onto your Microsoft Windows laptop or desktop and does all the heavy lifting when you select to open files from your SharePoint Online, OneDrive for Business or Outlook Web Application.
When you select to open a file from one of the locations specified above, the Captisium universal file handler web-service will construct a file based on your request and use this file to launch the Captisium Universal File Handler Client-Side Application on your local computer.
The Client-Side application is launched and uses the instructions to download the requested file from your selected environment, work out which of your local software applications is mapped to the file extension, launch the local software application and then wait until you close the local software application before uploading the modified file back to the place it was downloaded from. That is unless the location was the Outlook Web App. It will not try to upload a modified file back to the outlook web app. This is because the attachment to an email is only considered editable prior to sending the file to the recipient, not after it has been received in an inline operation. Modifying the file using your local software application would be done in the same manner that you create and modify files now.
Considering the above, it is therefore essential, that you save the file after editing back to the same file location and filename that was opened in your local software application when it was launched. In most cases, this will be the "Save" action within the local software application and not the "Save As" action, which will create a new file. If there is no way you can get your local software application to save your modifications back to the original filename and location, you will need to manually upload the modified file to the platform your wish the file to be located in, albeit SharePoint Online or OneDrive for Business.
The Captisium Universal File Handler Client-Side Application may not open all the types of files that you would like in the local software applications selected. This is because some local software applications don't accept a command-line parameter to open a file or your local mapping for the file extension is not the local software application you might be expecting. If this is the case, the local software application may still be launched, but you will need to use the internal menu of the local software application to locate your file and open it manually. When you make the necessary changes, save your work and exit the local software application, the Captisium Universal File Handler Client-Side Application will automatically upload the modified file back to the same place it was downloaded from.
At present, the Captisium Universal File Handler Client-Side Application is only available in English. This will change over time to include other languages if the need exists. It is assumed that your local Microsoft Windows computer is patched with the latest updates from Microsoft.
See the Version Release and Change Log.
You will need to install the Captisium Universal File Handler Client-Side Application to every Microsoft Windows desktop or laptop that you wish to access your SharePoint Online, OneDrive for Business or Outlook Web Application sites from.
You can download the latest version of the Captisium Universal File Handler Client-Side Application from here. The Setup Application is a Self-extracting executable file, which may be blocked by some corporate firewalls. If this is the case, you may need to seek assistance from your IT department or provider about how you can get this file.
The installation program will work out if your computer is a 32-bit or a 64-bit operating system and install the libraries it needs to run.
The security configured on your local computer will depend on the ease with which you can perform the Captisium Universal File Handler Client-Side Application setup. If you find that the setup is blocked, requires Administrator level permissions or such, you will need to contact your local IT department, we can't help you with these types of issues. User Support is only available once your Captisium Universal File Handler Client-Side Application is installed on your local computer.
Download and Automatic Setup
Your automatic setup experience may differ slightly depending on the browser that you are using. If you would like specific browser help, select the browser that you are using for specific details, otherwise, just keep going with this document once you have launched the setup application., from the Download Application page.
NOTICE: Edge is only available on the Windows 10 platform.
NOTICE: Google Chrome was tested on all Windows 7, 8.1 and 10 platforms.
NOTICE: Safari is no longer supported on the Microsoft Windows platform, so it will eventually be removed from our testing regime. We anticipate that we will release the Mac version of the Captisium Universal File Handler for the Apple platform in the future, but no date for this has been determined. SharePoint Online Doesn't Support Apple Safari.
NOTICE: Firefox was tested on all Windows 7, 8.1 and 10 Platforms.
Internet Explorer 11 (IE)
NOTICE: IE11 was tested on all Windows 7, 8.1 and 10 platforms.
Captisium File Extension ".capfl"
We have our own unique file extension which is automatically associated with the Captisium Universal File Handler Client-Side Application when the app is installed, it is the .capfl file extension. You may see files with this extension in your local computer folders.
Managing File Extension Associations
Your local software application File Extension Associations determine which local software applications are used to launch the files that you download and open with the Captisium Universal File Handler from your SharePoint Online, OneDrive for Business or Outlook Web Application environments.
If you have a file, say .psd mapped to Adobe Creative Suite's Photoshop, whenever you download a file with the .psd file extension, that's the local software application that will be launched to try to open the file. This may not be the local software application that you want to open this kind of file extension, you may, for example, want to use another software application like, Corel's Paint Shop Pro.
These local computer configurations are not controlled by the Captisium Universal File Handler, they are part of your local computer configuration.
We have a series of blog posts that will help you to understand and change your local computer file extension associations.
Current File Extensions