Organizing your email workflow starts with renaming categories in Outlook to match your current projects. If you are wondering how to rename categories in outlook, this guide walks you through every step clearly and quickly.
Categories help you color-code and group emails, tasks, and calendar events. But when your projects change, those default names like “Blue Category” no longer make sense. Renaming them is simple once you know where to look.
In this article, you will learn multiple methods to rename categories across Outlook for Windows, Mac, and the web version. We also cover common mistakes and troubleshooting tips.
Why Renaming Categories Matters For Your Workflow
Default category names are generic. “Red Category” tells you nothing about the project it represents. When you rename categories to match actual tasks—like “Client Reports” or “Q4 Planning”—your inbox becomes instantly scannable.
Renaming also prevents confusion when sharing categories with colleagues. A category called “Urgent” is clearer than “Orange Category.”
How To Rename Categories In Outlook (Desktop Version)
This section covers the most common method for Outlook 2016, 2019, and Microsoft 365 on Windows.
Step 1: Open The Categorize Menu
Start by clicking on any email, task, or calendar item. On the Home tab of the ribbon, look for the “Categorize” button. It is usually located in the Tags group.
Step 2: Access All Categories
From the drop-down menu, select “All Categories.” This opens the Color Categories dialog box.
Step 3: Select And Rename
In the dialog box, click the category you want to rename. Then click the “Rename” button. The category name becomes editable. Type your new name and press Enter.
Step 4: Confirm Changes
Click “OK” to close the dialog. The renamed category now appears in your list with the same color but the new label.
Note: Renaming a category does not change its color. You can change the color separately if needed.
How To Rename Categories In Outlook For Mac
The Mac version of Outlook works slightly differently. Here is how to rename categories on macOS.
Step 1: Open Preferences
In Outlook for Mac, go to the “Outlook” menu and select “Preferences.” Then click “Categories.”
Step 2: Edit The Category
Find the category you want to rename. Click the name once to highlight it, then click again to edit. Alternatively, right-click the category and choose “Rename.”
Step 3: Type The New Name
Type your desired name and press Return. The change saves automatically.
If you use multiple Macs, categories sync via iCloud or Exchange, so renaming on one device updates everywhere.
How To Rename Categories In Outlook On The Web
Outlook on the web (OWA) has a simpler interface. Here is the process.
Step 1: Open Settings
Click the gear icon in the top-right corner. Then select “View all Outlook settings” at the bottom of the settings pane.
Step 2: Go To Categories
In the settings window, choose “General” and then “Categories.”
Step 3: Rename The Category
Hover over the category you want to change. A pencil icon appears. Click it, edit the name, and press Enter or click outside the field.
Changes apply immediately across all folders and devices synced to your account.
How To Rename Categories In Outlook Using Shortcuts
If you prefer keyboard shortcuts, here is a faster way for Windows users.
Use The Quick Access Toolbar
Add the “Categorize” button to your Quick Access Toolbar. Then press Alt + number (where number is the position of the button) to open the menu. Use arrow keys to select “All Categories” and press Enter.
Right-Click Method
Right-click any item that already has a category applied. From the context menu, choose “Categorize” and then “All Categories.” This opens the same dialog box.
Common Mistakes When Renaming Categories
Even experienced users make these errors. Avoid them to save time.
- Renaming the wrong category: Double-check the color before renaming. Outlook shows the color swatch next to the name.
- Using special characters: Avoid symbols like / or * in category names. They can cause sync issues.
- Forgetting to sync: If you use multiple devices, wait a few minutes for changes to propagate.
- Renaming a shared category: If your organization uses shared categories, renaming affects everyone. Check with your team first.
How To Rename Categories In Outlook Without Losing Data
Renaming a category does not delete any emails or tasks. The items keep their color assignment. The only change is the label.
However, if you rename a category that is used in search folders or rules, those rules still work because they rely on the category color, not the name. But for clarity, update the rule descriptions manually.
Update Rules After Renaming
Go to File > Manage Rules & Alerts. Find any rule that references the old category name. Edit the rule to reflect the new name. This step is optional but recommended.
How To Rename Multiple Categories At Once
Outlook does not have a built-in bulk rename feature. You must rename each category individually. However, you can use a workaround.
Export And Edit Categories
Export your categories to a CSV file using a third-party tool or PowerShell script. Edit the names in Excel, then import them back. This method is advanced and requires caution.
For most users, renaming one at a time is faster and safer.
How To Rename Categories In Outlook For Shared Mailboxes
Shared mailboxes in Outlook use the same category list as your primary mailbox. Renaming a category here affects your view only. Other users see their own category names unless you are using a shared category list.
If your organization uses Microsoft 365 Groups or shared categories, changes sync to all members. Communicate changes before renaming.
How To Rename Categories In Outlook Mobile App
The Outlook mobile app for iOS and Android does not allow renaming categories directly. You must rename them on the desktop or web version. The changes then sync to your mobile app.
To access categories on mobile, tap the three-dot menu on an email and select “Categorize.” The renamed categories appear automatically.
How To Rename Categories In Outlook Using PowerShell
For IT admins or advanced users, PowerShell offers a scriptable method. Here is a basic example.
- Open Exchange Online PowerShell.
- Run the command:
Get-MailboxFolderStatistics -Identity "user@domain.com" | Where-Object {$_.FolderType -eq "Calendar"} | Set-MailboxFolder -Name "NewName" - Replace “NewName” with your desired category name.
This method is powerful but risky. Test on a test mailbox first.
How To Rename Categories In Outlook And Keep Colors
Colors are tied to the category position in the list, not the name. When you rename, the color stays the same. To change the color, use the “Color” drop-down in the same dialog box.
If you accidentally delete a category, you lose the color assignment. Recreate it with the same color to restore.
How To Rename Categories In Outlook For Better Organization
Here are naming tips to maximize productivity.
- Use action words: “Follow Up,” “Review,” “Archive.”
- Include project names: “Website Redesign,” “Budget 2025.”
- Keep names short: Under 20 characters for easy scanning.
- Use consistent prefixes: “Client – ABC Corp,” “Client – XYZ Inc.”
How To Rename Categories In Outlook When They Are Grayed Out
Sometimes the rename option is disabled. This happens if:
- The category is from a shared mailbox where you have read-only access.
- Your organization uses a master category list managed by IT.
- You are using an older version of Outlook that does not support renaming.
Contact your IT administrator if you cannot rename categories. They may need to update permissions or policies.
How To Rename Categories In Outlook And Sync With Teams
Categories in Outlook sync with Microsoft Teams if you use the same Microsoft 365 account. Rename them in Outlook, and they update in Teams after a few minutes. This helps maintain consistency across apps.
Note that Teams uses the same category list for tasks and planner items.
How To Rename Categories In Outlook For Calendar Items
Calendar events use the same category system as emails. Renaming a category changes it for all items. You do not need a separate process for calendar categories.
To apply a renamed category to a calendar event, open the event and click “Categorize” in the ribbon.
How To Rename Categories In Outlook Without Affecting Others
If you are in a shared environment, create personal categories instead of renaming shared ones. Personal categories are only visible to you.
To create a personal category, go to “All Categories” and click “New.” Name it anything you want. These do not sync with your organization.
How To Rename Categories In Outlook After Upgrade
Upgrading Outlook does not delete your categories. They remain intact. However, the interface may change slightly. The steps above work for all recent versions.
If categories disappear after an upgrade, check your profile settings. Sometimes the category file becomes corrupted. Export and reimport categories to fix this.
How To Rename Categories In Outlook Using Registry Editor
This method is for advanced users only. Editing the registry can break Outlook.
- Close Outlook.
- Press Win + R, type “regedit,” and press Enter.
- Navigate to:
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Categories - Find the category key and rename the “Name” value.
- Restart Outlook.
Backup the registry before making changes. This method is not recommended for most users.
How To Rename Categories In Outlook And Avoid Duplicates
Duplicates happen when you rename a category but another category with the same name already exists. Outlook warns you if a duplicate name is detected. Choose a unique name to avoid confusion.
If duplicates appear anyway, delete the extra category from “All Categories.”
How To Rename Categories In Outlook For Better Search
Renamed categories improve search. You can search for “Category:NewName” in the search bar. This works faster than scrolling through folders.
For example, type category:"Client Reports" to see all items with that category.
How To Rename Categories In Outlook And Use With Quick Steps
Quick Steps can apply categories automatically. After renaming, update the Quick Step to use the new name. Go to Home > Quick Steps > Manage Quick Steps. Edit the step and select the renamed category.
How To Rename Categories In Outlook For Tasks
Tasks in Outlook use the same category system. Rename a category, and it updates for all tasks. To apply a renamed category to a task, open the task and click “Categorize.”
How To Rename Categories In Outlook And Keep History
Renaming does not change the history of items. Emails from last year still show the new name. This is because Outlook stores the category color, not the name, in the item properties.
If you want to keep the old name for historical reference, create a new category instead of renaming.
Frequently Asked Questions
Can I Rename A Category In Outlook Without Losing Its Color?
Yes, renaming only changes the label. The color remains the same.
Why Can’t I Rename A Category In Outlook?
Possible reasons include read-only permissions, a managed category list by IT, or using an older version. Check your permissions or contact support.
Does Renaming A Category Affect My Emails?
No, emails keep their category assignment. Only the label changes.
How Do I Rename A Category In Outlook For Mac?
Go to Outlook > Preferences > Categories. Click the name to edit it.
Can I Rename Categories In Outlook On The Web?
Yes, go to Settings > General > Categories. Click the pencil icon to rename.
Final Tips For Renaming Categories In Outlook
Renaming categories is a small change that makes a big difference. Start with the most used categories first. Test the new names for a few days to ensure they work for you.
Remember to update any rules or Quick Steps that reference old names. Share the new names with your team if you use shared categories.
With these steps, you now know exactly how to rename categories in outlook for any version or device. Your inbox will thank you.