How to Enable/Disable Add-Ins in Outlook 365? : [A Concise Guide]

Last Updated on July 31, 2023 by Amit Bansal

Managing add-ins in Outlook 365 can significantly improve productivity and enhance the user experience.

However, sometimes add-ins may become disabled due to various factors, such as conflicts with other programs, performance issues, or updates.

It’s essential for users to understand how to enable these disabled add-ins in Outlook 365 to fully utilize the available features and streamline their workflow.

Outlook 365 offers a user-friendly interface for managing add-ins, allowing you to easily enable or disable them as needed.

This is particularly important for maximizing your email client’s performance and ensuring smooth operation.

In the following sections, we will provide step-by-step guidance on how to enable disabled add-ins in Outlook 365 and discuss various aspects related to managing these handy tools, including performance, load behavior, and common errors.

Key Takeaways

  • Enabling disabled add-ins in Outlook 365 is crucial for a seamless user experience and optimized performance.
  • Understanding the factors that lead to disabled add-ins helps prevent future issues and allows better management.
  • Explore solutions for common errors related to add-ins and consider security and subscription benefits when managing your Outlook tools.

Understanding Outlook Add-Ins and Disabled Status

Outlook Add-Ins are helpful tools to improve our workflow and productivity by extending the functionality of the application.

However, we might face situations where some of our add-ins become disabled, causing issues with our daily tasks. In this section, we’ll discuss how to re-enable these disabled add-ins in Outlook 365.

When an add-in is disabled in Outlook, it’s usually because the application has detected performance issues or conflicts with the add-in.

Outlook might disable an add-in automatically, or we might have manually disabled it ourselves.

It’s important for us to understand why the add-in was disabled so we can make informed choices about whether to re-enable it or not.

To manage our Outlook add-ins and check their status, we can follow these steps:

  1. Click on File >> Options >> Add-Ins.
  2. In the “Add-Ins” list, we’ll be able to see each add-in’s name, publisher, compatibility, location on our computer and a description of its functions.
  3. At the bottom, we’ll find a dropdown list for “Manage”. Select COM Add-ins and click on Go.

In the COM Add-ins dialog, we can see the disabled add-ins and their checkboxes. If we want to enable a disabled add-in, we can simply check its box.

Also Read: – How to Add VBA Code to Outlook: [A Concise Guide]

For add-ins not showing up in the list, we can click on the “Add” button and browse our computer to find the file we want; once we locate it, we can click on it to add it to the list.

Finally, after selecting the add-ins we’d like to enable, we can click “OK” to confirm our choices.

Remember, it’s essential to always consider the reason a certain add-in was disabled before re-enabling it, as it might negatively impact the overall performance of Outlook 365.

Now that we’ve covered how to enable disabled add-ins in Outlook 365, we can take advantage of these helpful tools to maximize productivity and enhance our experience using the application.

Enabling Disabled Add-Ins in Outlook 365

As experts on Microsoft products, we’re here to guide you on how to easily enable disabled add-ins in Outlook 365.

This process will help improve your Outlook experience by activating additional features and tools.

Step-by-Step Guide

  1. First, open your Microsoft Outlook 365 application on your computer.
  2. Click on the File tab located at the top-left corner of the screen.
  3. In the File menu, select Options. Upon clicking, a new window titled “Outlook Options” will appear.
  4. In the Outlook Options window, you will find a vertical list of categories on the left side. Click on Add-Ins to access the add-ins management section.
  5. At the bottom of the Add-Ins section, you will see a dropdown list labeled Manage. From this list, select COM Add-ins and then click on the Go button.
  6. A new window titled “COM Add-Ins” will open, displaying all the available add-ins installed on your computer. To enable any disabled add-in, simply check the box corresponding to the add-in you wish to activate.
  7. If you cannot find the add-in you want to enable in the list, click on the Add button. This action will allow you to browse your computer for the file.
  8. Once you have selected the desired add-ins, click OK to save the changes and close the windows.

By following these simple steps, you can efficiently enable disabled add-ins in your Outlook 365 application, providing you with a seamless experience using the various features and tools that come with Microsoft 365.

Also Read: – How to Enable Outlook Macros: (A Step-by-Step Guide)

Enabling Disabled Add-Ins in Other Outlook Versions

Outlook 2010, 2013, and 2016

For users of Outlook 2010, 2013, and 2016, enabling disabled add-ins is quite straightforward. We recommend following these steps:

  1. Open Outlook and click on the File tab.
  2. Next, click on Options and then select Add-Ins.
  3. In the Add-Ins section, you should see a list of your available add-ins. At the bottom of the window, you will find a drop-down menu labeled Manage. Select Disabled Items and click Go.
  4. A new window will appear displaying a list of disabled add-ins. Select the add-in you wish to enable and click Enable.
  5. Restart Outlook for the changes to take effect.

Remember that keeping your add-ins up to date can improve their performance and compatibility with Outlook.

Outlook 2019 and 2021

In Outlook 2019 and 2021, the process of enabling disabled add-ins is quite similar to the previously mentioned versions. Follow these steps to enable your desired add-ins:

  1. Open Outlook and click on the File tab.
  2. Choose Options and then head to the Add-Ins section.
  3. Like in earlier versions, you will find a drop-down menu at the bottom of the window labeled Manage. This time, select COM Add-ins and click Go.
  4. In the COM Add-Ins window, locate the add-in you want to enable and check the box next to its name.
  5. Click OK and then restart Outlook to apply the changes.

By following these simple steps, you should be able to enable disabled add-ins in Outlook 2010, 2013, 2016, 2019, and 2021 with ease.

Always ensure your add-ins are updated to prevent compatibility issues and to keep your Outlook running smoothly.

Managing Add-Ins Performance and Load Behavior

In Outlook 365, managing add-ins performance and load behavior helps ensure a smooth user experience, especially when dealing with performance issues or slow and disabled COM add-ins.

In this section, we will discuss how to enable disabled add-ins and some best practices for managing their load behavior.

First, to view the installed add-ins, go to File >> Options >> Add-ins.

This will provide a list of add-ins with their publisher, compatibility, location, and description of their functions.

If an add-in has been disabled due to performance issues or has been identified as a slow-loading COM add-in, you can take action to enable it.

When you want to enable a disabled add-in, select it in the list, and then click the “Always enable this add-in” option.

This will update the registry to exempt the add-in from being auto-disabled by Outlook for performance reasons source.

Monitoring the load behavior of your add-ins is essential to avoid performance problems.

As a best practice, we recommend keeping an eye on any slow-loading add-ins and considering whether they are vital to your day-to-day work.

If an add-in isn’t essential, it might be a good idea to disable it to improve Outlook’s overall performance.

If an add-in has performance issues but is deemed essential, try contacting the add-in’s publisher for support or looking for updates that may improve its performance.

Additionally, you might consider adjusting Outlook’s settings to better accommodate the add-in’s resource demands.

Remember, managing add-ins performance and load behavior in Outlook 365 is crucial for maintaining optimal productivity and user experience.

By keeping an eye on slow and disabled COM add-ins, as well as their load behavior, we can ensure a seamless workflow while using Outlook.

Registry Modifications for Add-Ins

In this section, we will discuss the essential registry modifications for managing Outlook 365 add-ins. We will focus on two primary registry keys: HKEY_CURRENT_USER and HKEY_LOCAL_MACHINE.

Additionally, we will explore properties like LoadBehavior and ProgID for enabling and disabling add-ins.


The HKEY_CURRENT_USER registry key contains settings for the current user profile. To modify add-in settings for the individual user, we should navigate to the following registry path:


Replace “x.0” with the appropriate version of your Office installation (e.g., 16.0 for Office 2016) and “<application>” with the relevant app, such as Outlook.


The HKEY_LOCAL_MACHINE registry key stores settings that apply to all users on the computer. To modify add-in settings system-wide, we should navigate to the following registry path:


Again, replace “x.0” with the appropriate Office version and “<application>” with the app, such as Outlook.


In both HKEY_CURRENT_USER and HKEY_LOCAL_MACHINE paths, we can locate the LoadBehavior property. This property determines how an add-in is loaded in the application.

0Add-in is never loaded
2Add-in is loaded on demand
3Add-in is always loaded with Outlook

To enable or disable an add-in, we should modify the LoadBehavior value accordingly.


The ProgID (Programmatic Identifier) is a unique identifier for each add-in within the registry. It helps manage specific add-in settings.

To find the ProgID, we must look under the corresponding registry key path, HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE.

By modifying the LoadBehavior value for specific ProgIDs in the registry paths, we can control whether Outlook 365 add-ins are enabled or disabled for individual users or the entire system.

Dealing with Common Errors and Solutions

When using Outlook add-ins, we might encounter some common errors. In this section, we will discuss these issues and provide solutions to help us resolve them efficiently.

One common issue we might face is that the COM add-ins are not displayed in the COM Add-Ins dialog box as expected.

This usually happens due to damaged registry keys or invalid values. To fix this, we can try to manually enable the add-ins.

In Outlook, navigate to File >> Options >> Add-Ins, select COM Add-Ins in the Manage list, and click Go.

If the add-ins still do not appear, we may need to repair the registry keys following the instructions in this Microsoft article.

Another common error occurs when an add-in is automatically disabled by Outlook or is disabled by us.

In this case, Outlook might display a warning dialog box. To re-enable the add-in, choose the “Always enable this add-in” option in the warning dialog as described here.

If the add-in is in the Always Enabled List, follow the instructions provided to either enable or disable monitoring for that specific add-in.

Sometimes, even after enabling a disabled add-in, it might not show up in Outlook. In such cases, we can re-enable the add-in by following these steps:

Go to File >> Options >> Add-Ins, highlight the add-in, and follow the instructions in this Microsoft guide.

To avoid facing these issues in the future, we can efficiently manage our Outlook add-ins by regularly checking the list of installed add-ins.

We can do this by going to File >> Options >> Add-Ins. This will help us keep track of add-ins, update or remove those that are no longer necessary, and ensure our Outlook experience remains smooth and efficient.

By addressing these common errors and learning how to troubleshoot issues with Outlook add-ins, we can continue leveraging their functionalities to enhance our email experience and improve productivity.

Also Read: – How to Configure Junk Mail Filter Settings in Outlook 365: A Concise Guide

Group Policy and Add-In Resiliency

When working with Outlook 365, we sometimes encounter add-ins that become disabled due to various reasons, such as performance, resiliency, or reliability.

In this section, we’ll discuss how to manage and enable these disabled add-ins using group policy settings.

Managing add-ins in Outlook 365 can be done through group policy settings.

These settings allow administrators to control which add-ins are available to users and whether they can be disabled automatically by the application.

To ensure that an add-in remains enabled, we can update the registry to exempt it from the automatic disabling feature.

If an add-in becomes disabled, users can re-enable it by navigating to the Disabled Add-ins dialog box in Outlook and selecting the “Always enable this add-in” option.

However, modifying the registry can be risky and may cause serious problems if done incorrectly.

Therefore, it’s essential to approach this method with caution and consult an experienced professional if needed.

To further enhance add-in resiliency, it is crucial to understand the compatibility, location, and functions of each add-in.

By analyzing this information, administrators can make informed decisions when adjusting group policy settings for Outlook add-ins.

Additionally, keeping software up-to-date and evaluating add-ins regularly can help maintain their functionality and performance.

In summary, managing disabled add-ins in Outlook 365 through group policy and ensuring add-in resiliency involves understanding each add-in and following best practices when modifying registry settings.

By paying attention to these aspects, we can provide a more seamless and efficient experience for our users.

Utilizing Subscription Benefits

As part of your Microsoft 365 subscription, you have access to various benefits, including a wide range of add-ins that can enhance your Outlook experience.

Add-ins are tools designed to help you increase productivity and stay organized. In this section, we’ll guide you through the process of enabling disabled add-ins in Outlook 365.

First, let’s ensure we make the most out of our subscription benefits by understanding the available add-ins – ranging from email organization tools to time management solutions.

When you come across an add-in that seems useful, you’ll want to enable it to take advantage of its features. Here’s a step-by-step guide to enabling disabled add-ins:

  1. Open Outlook and click on File >> Options >> Add-Ins.
  2. From the drop-down list for “Manage,” select “COM Add-ins.”
  3. Click on “Go.”
  4. Select the boxes for the add-ins you want to turn on. If the add-in you want to enable is not showing up in the list, click on “Add” to browse your computer for the desired file.

By enabling these add-ins, we can make our daily tasks more efficient and use our subscription benefits to their full potential.

While Microsoft 365 offers a variety of productivity tools, don’t forget that your subscription also includes access to various training courses.

These courses aim to enhance our knowledge of Microsoft 365 features and maximize the usage of add-ins in Outlook.

Remember, we must be cautious in enabling add-ins from unfamiliar sources. Only enable reputable and trusted add-ins to maintain security and prevent potential issues.

In conclusion, by utilizing our Microsoft 365 subscription benefits, we can not only enhance our Outlook experience through various add-ins but also access training courses for maximum productivity.

Explore the range of add-ins available and enable those that best suit our needs to improve workflow and efficiency.

Engaging with Outlook Communities

Outlook communities are an invaluable resource for users seeking assistance or looking to expand their knowledge with the platform.

In this section, we will cover some of the key communities where you can find support and share expertise related to Outlook and its add-ins.

One of the most popular platforms to engage with fellow Outlook enthusiasts is Microsoft’s own Outlook Forum.

Here, we can share our experience, ask questions, and interact with professionals and other users who have in-depth knowledge about Outlook.

Another great community is Stack Overflow, where programmers and developers collaborate to address various technical issues, including those related to Outlook add-ins.

This wealth of knowledge can be especially helpful when troubleshooting specific add-in problems or seeking advice in developing custom add-ins.

Social media platforms such as LinkedIn and Twitter can also provide insights into the use of Outlook add-ins.

You can follow hashtags like #Outlook or #Office365 to stay updated on the latest developments, tips, and discussions within the community.

By connecting with Outlook professionals and enthusiasts, we can continue to grow our knowledge and adapt to new trends.

Finally, we would also like to encourage participation in local Outlook or Microsoft 365 user groups.

These gatherings can help us connect with like-minded professionals and discover new perspectives on how to leverage Outlook add-ins to improve our productivity.

Remember, by actively engaging with these communities, we not only learn new ways to optimize our Outlook experience but also contribute to the growth and success of other users.

Happy networking!

Also Read: – How to Insert a Date Picker in Outlook Email?

Exploring Office Add-Ins in Other Microsoft Programs

In Microsoft 365, Office Add-Ins allow users to enhance the functionality of different programs.

Let’s take a look at how these add-ins are integrated into various Microsoft applications.


In Word, Office Add-Ins can expand the program’s capabilities, such as enabling sophisticated document collaboration, improving grammar checks, and offering more formatting options.

To enable Office Add-Ins in Word, go to File >> Options >> Add-Ins and manage them from there.


We can find similar benefits with Office Add-Ins in Excel. With add-ins, users can access advanced data analysis tools, create interactive visualizations, and automate complex tasks.

You can enable these add-ins by going to File >> Options >> Add-Ins and selecting the desired options.


Office Add-Ins in PowerPoint provides users with new presentation features such as integrating live data, adding interactive elements, and embedding videos from various sources.

To enable these add-ins, follow the same procedure as in Word and Excel: go to File >> Options >> Add-Ins.


In Access, Office Add-Ins are valuable in simplifying database management, improving data import and export, and offering custom reporting features.

To enable them, access the add-ins management through File >> Options >> Add-Ins.


Office Add-Ins for Microsoft Project enhance the overall project management experience.

They provide extended reporting features, better resource management, and third-party integrations.

You can enable these add-ins by navigating to File >> Options >> Add-Ins.


Visio benefits from Office Add-Ins by offering improved diagramming capabilities, automated shape placement, and more customization options.

To enable these add-ins, follow the same steps and go to File >> Options >> Add-Ins.


Although Microsoft Explorer isn’t part of the Microsoft Office suite, some Office Add-Ins might interact with the program, such as those related to document management and previewing Office files within the file explorer.

Enabling these add-ins requires managing them through each corresponding Office program.

By enabling Office Add-Ins across these Microsoft programs, you can dramatically improve your overall productivity and user experience.

Trust Center and Security Considerations

As we work with Outlook 365 and its numerous add-ins, it is essential for us to consider the security aspects of these add-ins.

The Trust Center in Outlook provides us with a centralized place to manage and enable add-ins, ensuring that we use only secure and trusted add-ins in our day-to-day operations.

Firstly, we should always check the publisher of the add-in before enabling it. Reputable publishers are more likely to have taken security precautions when developing their add-ins.

Outlook’s Trust Center displays the add-in’s publisher, location, and a brief description to help us assess its trustworthiness before enabling it.

When managing the add-ins in Outlook 365, we can navigate to the Trust Center through the File menu and then select Options, followed by Add-Ins.

Here, we can view, enable, or disable the add-ins that are currently installed on our system. We can also access advanced settings to further customize our add-in experience.

While enabling an add-in, it is crucial to ensure it is compatible with our current version of Outlook. Incompatible or outdated add-ins may pose security risks or cause stability issues within the software.

The Trust Center provides information on the compatibility status of each add-in, allowing us to determine if it is safe to enable.

In addition to checking the compatibility, we should also consider the scope of permissions each add-in requires.

Some add-ins may request access to sensitive information or certain functionalities in Outlook that could be exploited if the add-in is compromised.

We must weigh the benefits of using the add-in against the potential security risks associated with granting it access to sensitive data or capabilities.

In summary, through the Outlook 365 Trust Center, we can exercise greater control over the add-ins we use, ensuring a secure and well-managed experience.

By considering the publisher, compatibility, permissions, and description details of each add-in, we can confidently and knowledgeably implement the tools that best suit our needs while maintaining a secure environment.

Frequently Asked Questions (FAQs)

How can I reactivate grayed-out add-ins in Outlook 365?

If an Office add-in for Outlook isn’t showing up or is grayed out, it may have been disabled. To enable it, click on File >> Options >> Add-Ins.

In the Manage drop-down menu, select Disabled Items and click Go. In the dialog box, select the disabled add-in and click Enable.

Once done, restart Outlook to apply the changes. For more information, refer to Microsoft Support.

What is the process for managing add-ins in Outlook Web?

To manage add-ins in Outlook Web, click on the gear icon (Settings) at the top right corner. Then, click on “View all Outlook settings.”

Navigate to Mail >> Customize Actions >> Message Surface to view and manage the installed add-ins.

How can I prevent Outlook from disabling add-ins in Office 365?

To prevent Outlook from automatically disabling add-ins, go to File >> Options >> Trust Center >> Trust Center Settings.

In the Trust Center window, click on “Add-ins” on the left side, and then uncheck the box that says, “Disable all Application Add-ins.”

What steps do I need to take to enable disabled add-ins in Word 365?

Similar to Outlook, you can enable disabled add-ins in Word 365 by going to File > Options > Add-Ins.

In the Manage drop-down menu, select Disabled Items and click Go. In the dialog box, select the disabled add-in and click Enable. Restart Word to apply the changes.

Why might my add-ins be missing in Outlook, and how can I regain access?

Missing add-ins in Outlook may be due to disabling or compatibility issues. To regain access, try enabling the disabled add-ins as described earlier in this section.

If the issue persists, confirm that the add-ins are compatible with your version of Outlook, or consider reinstalling them if necessary.

Where can I find and download Office 365 add-ins?

To find and download Office 365 add-ins, click on “Insert” from the Ribbon menu, then choose “Get Add-ins” or “My Add-ins.”

You can search for new add-ins directly from the menu or browse the selection available in the Microsoft online store.

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Amit Bansal

Hello, my name is Amit Kumar Bansal, and I am the founder of Through this blog, I focus on Microsoft Outlook, offering insightful and informative content. Additionally, I produce educational videos on YouTube to further enhance the understanding of my audience. visit my YouTube Channel

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