The Microsoft Office Configuration Analyzer Tool (OffCAT) provides a detailed report of your installed Office programs. This report includes many parameters about your Office program configuration. It also highlights known problems that are found when OffCAT scans your computer. For any problems that are listed in the report, you are provided a link to a public-facing article (usually a Microsoft Knowledge Base article) about each problem so that you can read about possible fixes. If you are a Helpdesk professional, you can also save the report to a file so that it can be viewed in the Office Configuration Analyzer Tool on another client on which the tool is installed.
Note This article is updated to include new information about OffCAT version 2.1.
OffCAT system requirements
The following operating systems are supported:
Windows 8 and Windows 8.1
Windows Vista Service Pack 2
Windows Server 2008 and Windows Server 2008 R2
Windows Server 2012 and Windows Server 2012 R2
This download works with the following versions of Office:
Microsoft Office 2016 (32-bit or 64-bit) (Click-to-run or MSI installations)
Microsoft Office 2013 (32-bit or 64-bit) (Click-to-run or MSI installations)
Microsoft Office 2010 (32-bit or 64-bit)
Microsoft Office 2007
You must have the .NET Framework 4.5 installed
Use the following steps to determine if you have .NET Framework 4.5 installed
Windows 10, Windows 8 , Windows 8.1 , and Windows Server 2012
These versions of Windows have .NET Framework 4.5 included as part of the operating system. Therefore, to use OffCAT v2.1, no updates to the .NET Framework are required.
Windows 7 and Windows Vista
Click Start , and then click Control Panel.
Click View by, and then select either Small icons or Large icons.
Click Programs and Features.
Examine the list of installed programs.
If you have .NET Framework 4.5 installed you will see an entry similar to the following entry in the list of installed programs.
Note, the following figure shows .NET Framework 4.5.2, which is an updated version of .NET Framework 4.5.
If you have .NET Framework 4.5 (or later) installed, you can use OffCAT v2.1 without installing any updates to the .NET Framework.
If you do not see a .NET Framework entry that includes '4.5' in the name, please continue with step 5.
Click the following link, and then click Download on the Microsoft Download Center page.
The steps you take to install OffCAT with the OffCAT.msi file vary, depending on your version of Windows. Please use the steps provided below for your version of Windows.
Windows 10, Windows 8, Windows 8.1, Windows 7, or Windows Vista
Start the OffCAT installation by either clicking Run when prompted by the Microsoft Download Center or by double-clicking OffCAT.msi (that you downloaded from the Microsoft Download Center).
If you agree with the terms, select I accept the terms in the License Agreement, then click Next.
In the Additional Options dialog box you will find an option to Launch OffCAT at the end of setup. If you want OffCAT to start once the installation process is finished, leave this option enabled, and then click Next.
In the next dialog box, click Install to start the actual installation of OffCAT.
If you are prompted by User Account Control to allow the program to make changes to your computer, click Yes.
Note, this prompt usually occurs when you have an earlier version of OffCAT installed. The prompt occurs because the OffCAT v2 installer needs permission to uninstall this earlier version of OffCAT.
Click Finish to complete the installation of OffCAT.
The first time OffCAT is started after the installation has finished, the OffCAT icon in the notification area of the taskbar will display the following alert.
Windows Server 2012 or Windows Server 2008
Because of the security features built into Windows Server, you need to install OffCAT in an elevated context using the following steps.
Right-click the Command Prompt shortcut, then select Run as administrator.
In the command-prompt window, change to the folder containing the OffCAT.msi file.
Note If you do not follow the above steps on Windows Server you will receive the following error during setup:
Microsoft Office Configuration Analyzer Tool 2.1 must be installed with elevated permissions on Windows Server. Please restart this installer as an Administrator.
Windows Server with Terminal Services
If you are going to use OffCAT in a situation involving Terminal Services, you will need to use the following steps to install OffCAT. These steps are required in order to have OffCAT available to each user that logs into a Remote Desktop session.
Download/save OffCAT.msi from the Microsoft Download Center to a folder on the server.
Log into the server as a user who is a member of the local Administrators group.
Click Start, then click All Programs, then click Accessories, and then right-click the CommandPrompt shortcut.
Click Run as administrator.
In the command prompt window, change to the folder containing OffCAT.msi.
Note, in the above example, the InstallDir path is for a server with a 64-bit version of Windows. For a 32-bit version of Windows, you would use C:\Program Files\Microsoft\OffCAT for the path.
When the installation is finished, the OffCAT files will be in folder specified by the InstallDir argument (from the above command-line) and a shortcut will appear on the Start menu for all users that create a Remote Desktop session on the server
How to start OffCAT and generate a report
To start the Office Configuration Analyzer Tool, use the steps provided below for your version of Windows.
In the Search the web and Windows box, type OffCAT.
Select OffCAT - Office Configuration Analyzer in the search results.
Windows 8.1 and Windows 8
In the Search results, click the link for Microsoft Office Configuration Analyzer Tool.
Tip: If you want to pin the OffCAT icon to your Start page or the Taskbar, right-click the Microsoft Office Configuration Analyzer Tool shortcut, and then select either 'Pin' option.
Windows 7 or Windows Vista
On the Start menu, click Microsoft Office Configuration Analyzer Tool.
Generating an OffCAT scan
After you start OffCAT, follow these steps to generate an OffCAT report for an Office program:
On the NEW SCAN page, select the Office program you would like to scan.
The following figure shows Outlook as the selected program.
To see all of the Office programs you currently have installed, click More applications.
Note, the Scan control fills with color (based on your OffCAT theme color) when you have one program selected and you hover your cursor over the Scan control.
Wait for the scanning process to complete.
Review the list of issues identified during the scan.
Read the detailed description of any issue in the reading pane under Solution and Issue Description.
Click the 'Click here to see possible online solutions to this issue' link in the reading pane to see the steps to resolve the selected issue.
How to uninstall OffCAT
To uninstall OffCAT, follow these steps:
Close any open Office programs.
Right-click the OffCAT icon in the notification area of the taskbar, and then click Exit.
Open Control Panel.
In Control Panel under Programs, select Uninstall a program.
In the list of programs, select Microsoft Office Configuration Analyzer Tool 2.1, then click Uninstall.
Click Yes to confirm you want to uninstall Microsoft Office Configuration Analyzer Tool 2.1.
Current issues and frequently asked questions (FAQ)
This section will be updated on a regular basis as new issues are discovered. Please check back here periodically to see whether new items are added.
Can I scan Office 2003 programs with OffCAT v2.1?
OffCAT does not support scanning Office 2003 programs. Please see the following page for links to self-support options.
Addition of OneDrive for Business to the list of detected programs (added in v2)
OneDrive for Business is a very popular component of Office. It is installed with Office 2013, but it also can be downloaded and installed to work with earlier Office version programs.
Addition of Skype for Business to the list of detected programs
Skype for Business is another popular Office component that can be scanned by OffCAT starting in v2.1.
Reading pane for detected issues (added in v2.0 and updated in v2.1)
The Issues Lists displays the description and solution for the selected issue in a more convenient location on the right side of the report in the new reading pane.
Calendar Issues tile and report
Scans of Outlook include a separate Calendar Issues tile that includes a report of known issues detected in your Calendar folder. The Calendar Issues report also uses a reading pane to display the issue description and solution link as well as a link to open the item from your calendar.
New advanced tools for Outlook
In addition to the KMS Client Activation toolbox, found in earlier OffCAT versions, OffCAT v2.1 includes additional tools for troubleshooting Outlook issues. These new tools are found in the Outlook Logging section of the ADVANCED TOOLS page.
New file format for OffCAT scan files
When you perform a scan using OffCAT v2.1 your scan results are saved to your hard drive in the following default location:
The scan filenames use .offx for a file extension, which is different from earlier OffCAT versions that used .xml for the file extension. This .offx file extension is registered on your computer so that you can now double-click your .offx files to have them opened by OffCAT. This significantly reduces the time it takes to import a scan file.
OFFCAT ribbon tab in Office programs (added in v2.0 and updated in v2.1)
One of the biggest new additions to OffCAT v2.1 is the OFFCAT ribbon that appears in every Office program that supports custom ribbons. For example, the following figure shows how the OFFCAT ribbon appears in Microsoft Outlook.
Click More to see all of the controls available on the OFFCAT ribbon.
Use the features found on the OFFCAT ribbon to resolve many issues from within your Office programs.
Real-time error and crash detection
This feature scans errors displayed by Office programs and any crashing events, quickly comparing them against a list of known errors and crashes. If there is a match, a warning is displayed in the form of a notification alert. And, all of this happens in real-time when the OffCAT application isn’t even running.
The following figure shows a common error in Outlook and the real-time error alert which appears seconds after the error appears in Outlook. To find the solution to this error, all you have to do is click the alert.
A similar alert is displayed for a known crashing issue.
Can OffCAT be scripted to run on a client on which OffCAT is not installed?
Yes. The files that are installed by the OffCAT.msi file include OffCATcmd.exe. This is a command-line version of OffCAT. For more information, see the "Generating a Scan using the Command-line version of OffCAT" section of the OffCAT v2.1 ReadMe.docx file.
OffCAT v2.1 can scan the following Office program:
OneDrive for Business
Skype for Business
Why does selecting more than one program tile on the NEW SCAN PAGE generate separate scan files for each Office program?
This occurs because the OffCAT detection rules are program-specific. For example, if you are looking at a scan for Microsoft Office PowerPoint, you will see only the detected issues that are relevant to PowerPoint. This behavior lets you focus on the Office programs that might be experiencing the most issues without having to read a large scan report for all Office programs at one time.
If you want to submit feedback or improvement suggestions for OffCAT, click HELP/Feedbackin the top of the OffCAT window.
When you click Tell us what you liked or Tell us what we could do better, an email message is created and addressed to OffCATsupp@microsoft.com. Please provide as many details as possible so that we can provide a thorough review for your request.
Important Please be aware that you may not be contacted after you submit feedback.