Create a personal authentication mode connection for Google

Release version: Zurich

Updated March 12, 2026

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Summary of Create a personal authentication mode connection for Google

As a ServiceNow admin, you can establish a personal authentication mode connection for Google Calendar to synchronize reservations. This mode generates a user-level authentication token that allows creating, updating, or canceling reservations tied to a user’s Google Calendar. This integration ensures that events remain synchronized between ServiceNow and Google Calendar.

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Reservation Restrictions

When personal authentication mode is enabled, several restrictions apply to reservation management, especially concerning blocker, onbehalf, and group reservations:

Blocker reservations: Created in the delegated user's calendar with the requested-for user added as an invitee. If a blocker user is specified via system property, that user is added as an invitee instead.
Onbehalf user reservations: Not supported in personal mode for synchronized calendars because access to other users' calendars is restricted. However, onbehalf reservations can be created for non-synchronized rooms.
Group reservations: Not supported for synchronize-enabled rooms in personal mode, regardless of settings, but can be created for non-sync rooms.

Reservation Creation Rules

In personal authentication mode, reservations can only be created if the requested-for user matches the session user. Otherwise, creation is blocked.
For integrations outside ServiceNow interfaces (like IDEA panels or Reservation REST APIs), reservations are created in the delegated user’s mailbox with the requester added as an attendee, consistent with Strict mode behavior.
In Strict or Normal modes, there are no restrictions on creating reservations.

Reservation Update and Cancellation Rules

Normal mode: All reservations can be updated or canceled without restrictions.
Personal authentication mode:
- If the reservation's sync mailbox is set to other (delegated user calendar), it can be updated or canceled in that calendar.
- If the sync mailbox is set to user, updates or cancellations are only allowed if:
  - The operation is performed from supported interfaces (WSD Portal, Quick Reservation, WSD Mobile, or Event Planner).
  - The session user matches the requested-for user.
  - A personal authentication token exists for the user performing the update or cancellation.
- Reservations that cannot be edited appear dimmed in the event planner schedule view.
Strict mode: Users can update or cancel only reservations synced to the delegated user's mailbox (other).

As an admin, establish a personal authentication mode connection for Google Calendar to synchronize reservations. A user-level authentication token is generated that enables you to create, update, or cancel reservations to synchronize events on the Google Calendar.

Reservation restrictions

Review the restrictions for creating, updating, or deleting user reservations, as well as for blocker and group reservations, when personal authentication mode is enabled.

Table 1. Restrictions
Reservation type	Description
Blocker reservations	When Personal mode is enabled, blocker reservations are created in the delegated user's calendar, with the requested for user added as an invitee. If the `sn_wsd_rsv.blocker_user` system property specifies a blocker user, the system creates the reservation in the delegated user's calendar and adds the blocker user as an invitee.
Onbehalf user reservation	The This reservation is for field is not displayed in personal authentication mode. In personal mode, you can't create Onbehalf user reservations because you don’t have access to other user's calendar. However, you can create on-behalf reservations for non-synchronized rooms.
Group reservations	Group reservations aren’t supported in Personal mode for synchronize-enabled rooms, even if the Enable group reservations check box is selected in the reservable module. You can create group reservations for non-synced rooms.
Create reservation	The following restrictions apply when creating reservations from theWorkplace Service Delivery (WSD) portal, Event planner, Quick Reservation, and Now Mobile: In Personal mode If the requested-for user doesn’t match the session user, the reservation can’t be created. Note: When the integration mode is Personal Authentication and reservations are created through non-ServiceNow interfaces such as IDEA panels or the Reservation REST APIs, the reservation is created in the Delegated User's mailbox, with the requestor added as an attendee. This behavior is the same as Strict mode. In Strict or Normal mode Reservations can be created without any restrictions.
Update or cancel reservation	The following restrictions apply when updating or canceling reservations from the WSD portal, Event planner, and Now Mobile: In Normal mode All reservations can be updated or canceled. In Personal authentication mode If the Sync mailbox of the reservation is set to other (a reservation created in the delegated user calendar), the reservation can be updated or canceled in the delegated user calendar. If the Sync mailbox is set to user, the following rules apply: If the reservation is edited or canceled from sources other than WSD Portal, Quick Reservation, WSD Mobile, or Event Planner, it can’t be updated or canceled. If the session user (the person who is updating or canceling the reservation) doesn’t match the requested-for user, the reservation can’t be edited or canceled. If a personal token doesn’t exist for the user updating or canceling the reservation, the reservation can’t be updated or canceled. In all other cases, the reservation can be updated or canceled. Note: All the above reservations that can’t be updated or canceled appear dimmed in the schedule view of event planner workspace. In Strict mode Users can only update or cancel a reservation if the Sync mailbox is set to other in Strict mode.