
MS Outlook add-ins can greatly enhance your productivity and security, allowing you to manage your emails, calendar, and tasks more efficiently. They can also provide an extra layer of protection against spam and malware.
Outlook add-ins can automate repetitive tasks, such as sending follow-up emails or scheduling appointments, freeing up more time for important tasks. This automation can also help reduce errors and improve overall workflow.
Some popular add-ins include Grammarly, which checks for grammar and spelling errors, and Sanebox, which filters out unimportant emails.
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Installing Add-ins
Installing add-ins in Outlook is a straightforward process. You can access the Office Store from the navigation bar in new Outlook by selecting More Apps > Add apps.
To install an add-in from the Office Store, search for the add-in you want from the available list, or enter its name in the search box. When you find the add-in, select it to learn more about the add-in and review its privacy policy.
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You can also install a custom add-in from an XML file by going to https://aka.ms/olksideload in your preferred browser. Select My add-ins, then select Add a custom add-in and choose Add from file.
Here's a step-by-step guide to installing a custom add-in from an XML file:
- Select the XML file for the add-in.
- Select Install to install the add-in.
Note that you may need to close the Add-Ins for Outlook dialog and refresh the Outlook on the web page after installing the add-in.
Install from Office Store
To install an add-in from the Office Store, you can follow these steps.
In new Outlook, navigate to the navigation bar and select More Apps > Add apps. You can also access the Store from the Apps button to install an add-in directly from a message or appointment.
To search for an add-in, use the search box in the Apps page. You can enter the name of the add-in you're looking for, and it will appear in the list of available add-ins.
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To install the add-in, select Add after you've found the one you want. This will take you to a page where you can review the add-in's privacy policy and learn more about it.
In classic Outlook, the process is slightly different. First, select Home > All Apps from the ribbon.
Depending on your classic Outlook version or account type, you may see either Add Apps or Get Add-ins. If you see Add Apps, the Apps dialog will appear, while Get Add-ins will open the Add-Ins for Outlook dialog.
To search for an add-in in either dialog, use the search box. Enter the name of the add-in you want, and it will appear in the list of available add-ins.
Once you've found the add-in you want, select it to learn more and review its privacy policy. Then, select Add to install the add-in.
Install from File
Installing an add-in from a file can be a bit tricky, but don't worry, I've got you covered. You'll need to go to the Outlook on the web page by typing https://aka.ms/olksideload in your browser.
To start the process, select My add-ins from the Add-Ins for Outlook dialog that appears after a few seconds. This is the same dialog that loads when you access the provided URL.
In the Custom Addins section, you'll see the option to Add a custom add-in. Choose this option and then select Add from file. Note that the Add from URL option is no longer available for installing custom Outlook add-ins.
As a workaround, you can open the URL in your preferred browser to download the add-in file, then use the Add from File option to install it. This is a bit of a hassle, but it gets the job done.
To install the add-in, select the XML file for the add-in. This is the file that contains the add-in's code and functionality.
Once you've selected the XML file, select Install to install the add-in. This will add the add-in to your Outlook on the web page.
After installing the add-in, don't forget to close the Add-Ins for Outlook dialog. Then, refresh the Outlook on the web page to see the add-in in action.
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Using Add-ins
Using add-ins can be a game-changer for your email experience. You can install add-ins from the store, but if you have a custom add-in, you can install it from a file using the Add-Ins for Outlook dialog.
To use an add-in, you can add it to the ribbon or the app bar in classic Outlook. Some add-ins appear on the ribbon, while others appear on the app bar. You can also use an add-in while viewing or scheduling a meeting or appointment in new Outlook.
Here's a quick rundown of how to use an add-in:
If you're using an add-in that checks your outgoing messages before they're sent, you can save your message to the Outbox folder and it will be sent when you're back online. But if you're using an add-in that runs on send, the behavior may vary depending on how the add-in is configured.
Use
To use an add-in while reading a message in Outlook, you can follow these steps. First, select the message in the Reading Pane or open it in a separate window. Then, select More apps from the ribbon or Apps from the action bar of the message.
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You can quickly access your add-ins by pinning them to the ribbon and action bar. To pin an add-in, select More apps from the ribbon, then right-click the applicable add-in and select Pin. The add-in will appear in the ribbon and the action bar of a message.
To unpin an add-in, follow the same instructions to open the More apps menu, then select Unpin on the applicable add-in.
Here's a table outlining the availability of add-ins in shared mailboxes:
Some add-ins, like Meistertask, allow you to capture task requests directly from emails and turn them into actionable to-dos. Others, like Evercontact, automatically create and update contacts by extracting information from sender signatures.
Grammarly Spell Check
Grammarly Spell Check is a game-changer for anyone who wants to ensure their emails are error-free.
Grammarly is an AI-powered writing assistant that helps make sure communications are accurate and error-free.
Installing the Grammarly Outlook add-in enables you to check spelling, grammar, and punctuation and refine the tone of your email messages.
One of the best things about Grammarly is that it doesn't just spell and grammar check, but also suggests alternative phrasing to improve sentence structure.
However, it's worth noting that AI grammar suggestions are never entirely accurate, so additional human-level proofreading is needed.
Grammarly offers a limited free version, and paid subscriptions start at $4.99 a month, with options up to $14.99 a month.
6 Docusign Esignatures
Using Docusign Esignatures can streamline your communications and reduce your company's carbon footprint by removing the need to print documents to sign and return.
Docusign's Outlook add-in allows you to sign and return documents with ease, simply by adding your signature with your cursor.
You can connect your Docusign account with your Office365 credentials to save signed documents to OneDrive.
The interface of the Docusign add-in can be quite unintuitive, so be prepared for a bit of a learning curve.
Here are the key benefits of using Docusign's Outlook add-in:
- Sign and return documents electronically
- Save signed documents to OneDrive
10 Custom Signatures
Using Custom Signatures in Outlook can be a game-changer for your email communications.
You can set up independent signatures for different recipients and accounts with Custom Signatures, making it easier to tailor your emails to specific groups or individuals.
This feature supports both plain text and HTML emails, giving you flexibility in how you create your signatures.
Custom Signatures allows you to add multiple signatures for different recipients and accounts.
A notable con of Custom Signatures is that it displays a sponsored ad in the task pane.
Here are some key features of Custom Signatures:
- Supports independent signatures for different recipients
- Supports both plain text and HTML emails
- Displays a sponsored ad in the task pane
Giphy The GIFs
GIPHY is the best-known online source of GIFs and animated stickers.
You can integrate it directly with Outlook, making it easy to find and insert GIFs into your email messages.
Browse what's currently trending or use the search bar to find a specific GIF.
GIFs and stickers can be inserted easily with a click.
Probably don't overuse them in formal email threads...
Managing Add-ins
Managing Add-ins is a crucial aspect of getting the most out of your MS Outlook experience. You can install add-ins from the Microsoft Store, such as the Calendar Sync add-in, which allows you to sync your calendar across multiple devices.
To manage your add-ins, you can access the "Manage COM Add-ins" dialog box by going to File > Manage Add-ins. This dialog box allows you to enable or disable individual add-ins, giving you fine-grained control over which add-ins are running in the background.
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Move Watchdog for Preventing Accidents
Managing Add-ins is a crucial aspect of using Outlook efficiently. The right add-ins can save you from common errors like accidentally moving or deleting important items.
MAPILab Folder Guard is an excellent add-in that prevents such "filing accidents." It offers advanced permissions and warnings when you attempt to modify, delete, or move folders within Outlook.
This add-in is particularly useful for preventing accidental deletions or modifications of sensitive folders. It's also customizable, allowing you to set permissions according to your specific needs.

One of the key features of MAPILab Folder Guard is its ability to provide detailed folder protection. This means you can rest assured that your important folders are safe from accidental modifications.
The pricing for MAPILab Folder Guard is reasonable, with a free trial available and a premium version costing £19.75. This makes it an affordable option for those looking to prevent filing accidents.
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Classic
Classic Outlook users have a few options when it comes to add-ins. Depending on the type of add-in you've installed, it will appear in one of the following areas in Outlook.
The MeisterTask Outlook add-in is a great example of this, allowing users to capture task requests directly from emails and turn them into actionable to-dos. This is a secure and productive way to manage tasks and workflows.
Add-ins can be accessed in shared mailboxes in classic Outlook on Windows, but you'll need to know how to open and use a shared mailbox first. For guidance on this, see the relevant section of the article.
The availability of add-ins in shared mailboxes is outlined in a helpful table, which is a great resource to have when you're trying to figure out how to use your add-ins effectively.
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Security and Integration
For secure email management, consider using the Microsoft SMS add-in, which allows you to send texts from your Outlook email via mobile, but only works with Outlook 2010 or older.
You can also use the Hotmail Connector to view Hotmail from your Outlook interface, saving time and limiting the back and forth between logging in to both providers.
The Hightail for Outlook add-in provides a solution to the issue of sending large email attachments, allowing you to exceed two gigs and automatically storing your attachments.
Plugins for Device & System Integration
Plugins for Device & System Integration can greatly enhance your productivity and workflow.
The GApps Sync plugin allows you to maintain your familiar work environment while giving you access to new tools. This is especially helpful for employees who are used to a specific set of tools.
You can also integrate your email with cloud storage services like Dropbox, Google Drive, Box, and OneDrive using the Mail2Cloud plugin. This makes it easy to save and share important emails.

The GoToMeeting plugin enables you to video chat and collaborate with others remotely, and you can even schedule and update meeting details directly from Outlook.
The Microsoft SMS plugin allows you to send texts from your Outlook email via mobile, message entire groups, and save text messages as email drafts. However, note that it only works with Outlook 2010 or older.
The Hotmail Connector plugin lets you view your Hotmail account from within the Outlook interface, making it easier to manage multiple email accounts.
Send Data to Third Parties? Why?
Some add-ins might send data to third-party services, but it's only to complete the task you've requested.
The Bing maps add-in, for example, sends information to the Bing online service to find the location you've requested.
All add-ins are required to comply with their own privacy policies and Microsoft standards.
You can check the add-in's privacy statement for more details.
Enhance Security
Protecting your communications from interception is essential. Mailock is a secure email solution that offers end-to-end encryption and recipient ID checks for your messages.

Mailock is our secure email solution, offering businesses and individuals end-to-end encryption and recipient ID checks for their messages. The Mailock Outlook add-in protects highly sensitive information by making sure it can only be accessed by the right people.
The Mailock Outlook add-in is available only for Windows (although you can also use Mailock on the web). Pricing is free up to 5 sends a month, then £9.30/user/month.
If you accidentally send an email to the wrong person, Mailock has a revoke option to help protect against human error. Protecting against both cybercrime and human error is a great benefit of using Mailock.
Here are some key features of Mailock:
Move and Delete Watchdog is another tool that can help prevent accidental deletions. It applies a pop-up window that warns you as soon as you're about to delete or move a folder, reducing the chances of misclicking twice.
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Admin and Deployment
Admins can deploy add-ins to users' mailboxes, making them available on the read or compose surface where they're designed to work.
You can't install add-ins in a shared mailbox, even if you're the owner, unless the shared mailbox has been promoted to a full account. In that case, you can install add-ins, but they must be installed in your primary mailbox and configured to support shared mailboxes.
Administrators should deploy add-ins to users' primary mailboxes, not shared mailboxes. However, default Outlook add-ins like My Templates, Unsubscribe, and Action Items are available for use in shared mailboxes.
Here's a summary of add-in availability in shared mailboxes:
Availability When Offline
Outlook add-ins and the Microsoft 365 and Copilot store are unavailable when your machine is offline.
Administrators can configure mailbox policies to ensure that add-ins check messages for compliance before they're sent when a network connection is reestablished.
The behavior of add-ins varies depending on the type of add-in and the scenario. Here's a breakdown of what happens in different situations:
If you're using an add-in that checks your outgoing messages before they're sent, when you select Send while offline, your outgoing message is either saved to your Drafts or Outbox folder.
Shared Mailbox Availability
Shared mailboxes can be a bit tricky to work with, especially when it comes to add-ins. You can't install add-ins directly in a shared mailbox, but administrators can deploy them to a user's primary mailbox, which can then be used in the shared mailbox.
Administrators shouldn't deploy add-ins to shared mailboxes, but rather to individual user mailboxes. This is because add-ins installed by administrators are added to the user's primary mailbox and can then be used in the shared mailbox.
Default Outlook add-ins, such as My Templates and Unsubscribe, are available for use in shared mailboxes. However, templates created using the My Templates add-in are saved to the primary mailbox and can't be accessed by other users with access to the shared mailbox.
Templates created in a shared mailbox that has been promoted to a full account can be edited or used by anyone with access to the shared mailbox, as long as they also open the shared mailbox in new Outlook on Windows and promote it to a full account.
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Here's a summary of the availability of add-ins in shared mailboxes:
Add-ins used in read mode must be configured to support shared mailboxes, and add-ins used in compose mode must also be installed in the primary mailbox and configured to support shared mailboxes.
Deployed by Admins
If you're part of an organization and a new add-in is installed for you by your IT admin, the add-in will be available on the read or compose surface where it's designed to work. For guidance on how to access an add-in, see the section Use an add-in in Outlook.
Admins shouldn't deploy add-ins to a shared mailbox. They should instead deploy an add-in to a user's primary mailbox. This is because add-ins installed in a shared mailbox are only available to the user who installed them.
To access an add-in installed by an admin, you can simply launch Outlook and look for the add-in on the ribbon or action bar. The add-in will be available for use in both read and compose modes.
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Here's a quick rundown of the different types of add-ins and how they behave when deployed by admins:
Keep in mind that if you lose connection while using Outlook, your installed add-ins won't run. A dialog or notification will be shown to notify you that you're offline.
Supported Accounts
Outlook add-ins can run on Outlook.com (consumer or personal) and Microsoft 365 business mailbox accounts on supported Outlook clients. This includes both consumer and business accounts.
You can add non-Microsoft mailbox accounts, such as Gmail and Yahoo Mail, to certain Outlook clients, but add-in support may not be available.
The following table outlines add-in support on non-Microsoft accounts for each Outlook client:
If you do use a non-Microsoft account that supports add-ins, you'll need to select a folder or item in the non-Microsoft mailbox to load the add-in.
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Customization and Organization
SimplyFile is an Outlook add-in that uses AI to learn your habits and predict your actions, enabling messages to be moved into separate folders with just a click, saving a significant amount of time on manual organization.
The predictive folder organization feature is not 100% accurate, but it's a great time-saver nonetheless. I've used similar tools in the past and can attest to how much more efficient it makes your workflow.
If you're looking for a more hands-on approach to organization, you can use the deletion of message threads feature to keep your inbox tidy. This feature is also part of the SimplyFile add-in.
Here are some key features to consider:
If you're looking for a more creative way to customize your emails, you might want to check out Shared Email Templates. This add-in allows you to create custom templates for your emails and share them with friends and colleagues.
Get Started Building
To get started building Outlook add-ins, try the following: build a simple task pane with the Quick start guide.
To create more complex add-ins, start with the tutorial on inserting GitHub gists into a new message.

If you want to integrate your add-in with Outlook's existing functionality, take a look at the extension points.
There are three main ways to integrate your add-in with Outlook: declare buttons that appear in command surfaces, link off regular expression matches, or perform tasks when a specific event occurs.
To declare buttons, check out the Add-in commands for more information.
To link off regular expression matches, see Contextual Outlook add-ins, but be aware that entity-based contextual add-ins are now retired and you should implement regular expression rules instead.
To perform tasks with events, see Activate add-ins with events for more information.
Here are the three main extension points summarized:
- Declare buttons in command surfaces
- Link off regular expression matches
- Perform tasks with events
Shared Email Templates
Shared Email Templates can be a game-changer for your email workflow. They allow you to create custom templates for your emails, which can be especially helpful when answering common questions you receive through email.
With Template Phrases, you can arrange your snippets by category or by favourites, making it easy to find the right response. A handy search bar is also available to quickly find your required response.
Templates can be shared with friends and colleagues, which is a great feature for collaborative work.
The user interface is simple, but getting in the habit of using the templates takes a while.
Collaboration

Collaboration is key to any successful project, and having the right tools can make all the difference. Trello is a great example of this, allowing teams to streamline communication and project management.
Trello integrates seamlessly with Outlook, making it easy to keep track of tasks and due dates. You can even integrate your Trello board calendars with Outlook, giving you a clear overview of who's working on what and where they are in the process.
One of the downsides of Trello is that changes made in the app may not instantly update in Outlook. This can be frustrating, but it's a small price to pay for the benefits of using Trello.
Here are some key benefits of using Trello for collaboration:
- Easy integration with Outlook
- Clear overview of team projects and tasks
Meeting or Appointment Management
To efficiently manage your meetings and appointments in Outlook, consider the following tips.
First, open an existing appointment or create a new one to access the ribbon and select the add-in you want to use.
To view the ribbon on an existing meeting or appointment, you must open the meeting or appointment in a pop-up window.
By following these simple steps, you can effectively utilize add-ins while scheduling or viewing meetings and appointments in Outlook.
Curious to learn more? Check out: Microsoft Office Live Meeting
Free, Popular, Highly Rated

Installing custom add-ins for Outlook can be a game-changer for productivity. You can install a custom add-in from a file in new Outlook by going to https://aka.ms/olksideload in your browser.
The process involves a few simple steps, starting with selecting My add-ins and then choosing Add a custom add-in. From there, you can add the add-in from a file, which is a great option if you have a custom add-in you've created or downloaded.
To install a custom add-in, you'll need to select the XML file for the add-in and then click Install. This will add the add-in to your Outlook account, giving you access to its features and functionality.
Here's a brief rundown of the steps to install a custom add-in from a file:
- Go to https://aka.ms/olksideload in your browser.
- Select My add-ins and then choose Add a custom add-in.
- Add the add-in from a file.
- Select the XML file for the add-in.
- Click Install.
Frequently Asked Questions
What is the difference between Outlook add-ins and plugins?
Outlook add-ins are built using the Microsoft API and can be used from the web, while plugins are installable file packages for desktop use
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