When calendar events are created in NetSuite and synced to Outlook, external attendees may receive email notifications even if notifications are disabled in NetSuite.
To address this, ExtendSync introduces the Internal Only Event feature, which allows organizations to sync events to Outlook without notifying external attendees, while still keeping those attendees listed in NetSuite for record-keeping.
This feature is implemented via a custom field included in the ExtendSync Outlook bundle.
🚨 Important
If the Internal Only field is not showing, it must be enabled by a NetSuite Administrator before users can use it.
Meetings initially created with the internal flag unchecked will sync the external employees to Outlook and, because they exist in Outlook, they will continue to receive updates. Removing the external attendees from Outlook would then have the adverse effect of removing them from the NetSuite event as well.
You can manually fix this by doing the following:
Make a copy of the original event and mark it internal only before saving.
Delete the original event
➡️ See the Admin Guide on How to Enable Internal Only Event
What Happens When Internal Only Event is enabled?
Once it's saved and event syncs to Outlook, the external attendees won't be added in Outlook.
Only attendees of type Employee in your NetSuite account will be added in Outlook.
When you make changes to the Outlook event, the attendees list in Outlook will NOT override the list of attendees in NetSuite. The external attendees in NetSuite would be preserved.
How to Create an Internal-Only Event from NetSuite
Open the relevant NetSuite record
Go to Communication → Activities → New Event
Complete the event details as needed
Go to the Custom tab
Check Internal Only Event
Save the event.
Supported Use Cases
Use Internal Only Event for:
Internal team meetings
Reviews or planning sessions
Confidential or sensitive calendar entries
Adding internal notes or activities without notifying customers or partners
Best Practices
Educate users on when to use the Internal Only Event checkbox
Apply it consistently for internal-only meetings
Use it to maintain accurate NetSuite records without triggering unnecessary notifications
Combine with Calendar Autopilot for automated internal scheduling workflows