How to Add Custom Fields for Email Signatures

Short answer:
Create a custom field in Preferences > Fields to make additional user data available in your email signature templates.

When working with signature fields, you may notice that a required option is missing in the field drop-down.

This guide explains how to create a custom field so the data becomes available in your signatures.

Add a custom field

Custom fields are part of your global settings. Make sure to click Save before leaving your current template or editor.

1. Go to Preferences (gear icon in the top menu).
2. Select Fields.
3. Click the + button to create a new field.

You will be prompted to complete the following:

Name

The display name of your field.

Description

Optional, but recommended. You can reuse the field name for clarity.

Property Name

If syncing from Active Directory (on-prem or Azure), enter the matching AD attribute (LDAP name).
If not using AD, leave this field empty.

Field Type

Select how the data should behave:

String (default) – Standard text field (e.g., job title, phone number)
Image – Used for images such as headshots
List – Allows predefined options (e.g., social links)
Check – Checkbox to toggle content on/off (e.g., certifications)

Learn more about field types → How to use field types

Important: Click Save to create the field, and then click Save again to apply changes in Preferences.

Find the correct AD Property Name

If you are using Active Directory, you can locate the correct property name in:

Active Directory Users and Computers

This task is typically handled by your IT administrator.

Next steps

Once your custom field is created, you can:

• Apply it in your templates → Merge user data into signatures
• Allow employees to edit it → Let employees edit signature fields