Which HubSpot properties are updated
Last updated August 27, 2025
Let's review exactly which properties that OutboundSync is creating or updating based on campaign activity.
Properties will be broken into two main categories in this article: default properties and custom properties. Within that, we will have object-specific properties for companies or contacts.
The purpose of this article is to define the properties themselves.
Default properties
Default contact properties
By default, Contact search is done using the contacts' email address as the unique identifier. If a contact already exists and the fields have values, OutboundSync will not overwrite them. HubSpot's existing values will be left as-is.
Here are the default contact properties that OutboundSync interacts with, including: name, email address, website, and HubSpot owner ID.
| OutboundSync webhook property | OutboundSync webhook property notes | HubSpot Property label | HubSpot property internal label | HubSpot property type |
to_email | from email object | email | Single-line text | |
to_name
OR
to_email | if to_nameis not present then using to_email | First Name | firstname | Single-line text |
to_name | if to_name is not present then leave blank | Last Name | lastname | Single-line text |
domain | extracted after @ from email object | Website URL |
website | Single-line text |
webhook owner | If webhook checkbox "Assign contact owner" is selected then assign the owner, if not, leave blank | Contact owner | hubspot
_owner_id
| Single-line text |
Default company properties
If the webhook settings checkbox in OutboundSync has Create or update company Create or company company enabled, then OutboundSync will create or update companies.
By default, company search is done using the companies' domain as the unique identifier.
If a company already exists, OutboundSync will not overwrite that property. HubSpot's existing values will be left as-is.
Here are the default company properties that OutboundSync interacts with, including: domain.
| OutboundSync webhook property | OutboundSync webhook property notes | HubSpot Property label | HubSpot property internal label | HubSpot property type |
domain | extracted after @ from email object | Website URL | website | Single-line text |
Custom contact properties
OutboundSync requires that the user who creates the webhook has permission to create custom contact properties. Without these permissions, the application cannot perform this action.
OutboundSync also has an option to create custom contact properties. These properties serve to make your campaign data easily available in HubSpot for lists, views, workflows, and more.
In general, it is highly recommended that you enable these properties as they unlock significantly more usability of your outbound data inside of HubSpot.
These properties include:
| Webhook event type source | HubSpot custom contact property Name | HubSpot custom contact property internal label | HubSpot property type | Channel type |
| Bounce webhook | Last bounce time | os_last_ bounce_time | Date picker | |
| Every webhook | Last campaign ID | os_last_ campaign_id | Single-line text | EMAIL, SOCIAL |
| Every webhook | Last campaign name | os_last_ campaign_name | Single-line text | EMAIL, SOCIAL |
| Lead category webhook | Last lead category ID | os_last_ lead_category_id | Single-line text | EMAIL, SOCIAL |
| Lead category webhook | Last lead category name | os_last_ lead_category_name | Single-line text | EMAIL, SOCIAL |
| Click webhook | Last link click time | os_last_ link_click_time | Date picker | |
| Click webhook | Last link click URL | os_last_ link_click_url | Single-line text | |
| Open webhook | Last open message | os_last_ open_message | Single-line text | |
| Open webhook | Last open subject | os_last_ open_subject | Single-line text | |
| Open webhook | Last open time | os_last_ open_time | Date picker | |
| Reply webhook | Last reply message | os_last_ reply_message | Single-line text | |
| Reply webhook | Last reply address | os_last_ reply_address | Single-line text | |
| Reply webhook | Last reply subject | os_last_ reply_message | Single-line text | |
| Reply webhook | Last reply time | os_last_ reply_time | Date picker | |
| Sent webhook | Last sent message | os_last_ sent_message | Single-line text | |
| Sent webhook | Last sent address | os_last_ sent_address | Single-line text | |
| Sent webhook | Last sent subject | os_last_ sent_subject | Single-line text | |
| Sent webhook | Last sent time | os_last_ sent_time | Date picker | |
| Unsubscribe webhook | Last unsubscribe time | os_last_ unsubscribe_time | Date picker | |
| OutboundSync | Last update occurred | os_last_ update_occurred | Date picker | EMAIL, SOCIAL |
| OutboundSync | Last update source | os_last_ update_source | Single-line text | EMAIL, SOCIAL |
| Every webhook | Last app URL | os_last_ app_url | Single-line text | EMAIL, SOCIAL |
| Follow sent | Last follow sender | os_last_ follow_sender | Single-line text | SOCIAL |
| Follow sent | Last follow time | os_last_ follow_time | Date picker | SOCIAL |
| Liked post | Last like sender | os_last_ like_sender | Single-line text | SOCIAL |
| Liked post | Last like time | os_last_ like_time | Date picker | SOCIAL |
| Liked post | Last like post URL | os_last_ like_post_url | Single-line text | SOCIAL |
| Viewed profile | Last view sender | os_last_ view_sender | Single-line text | SOCIAL |
| Viewed profile | Last view time | os_last_ view_time | Date picker | SOCIAL |
| Connection request sent or accepted | Last connection status | os_last_ connection_status | Single-line text | SOCIAL |
| Connection request sent or accepted | Last connection status time | os_last_ connection_ status_time | Date picker | SOCIAL |
| Message sent | Last sent social message | os_last_ sent_social_message | Single-line text | SOCIAL |
| Message sent | Last sent social profile | os_last_ sent_social_profile | Single-line text | SOCIAL |
| Message sent | Last sent social sender | os_last_ sent_social_sender | Single-line text | SOCIAL |
| Message sent | Last sent social time | os_last_ sent_social_time | Date picker | SOCIAL |
| Message reply | Last reply social message | os_last_ reply_social_message | Single-line text | SOCIAL |
| Message reply | Last reply social profile | os_last_ reply_social_profile | Single-line text | SOCIAL |
| Message reply | Last reply social sender | os_last_ reply_social_sender | Single-line text | SOCIAL |
| Message reply | Last reply social time | os_last_ reply_social_time | Date picker | SOCIAL |