---
sourceDocument: Xanadu Employee Service Management
sourceDocumentLink: https://www.servicenow.com/docs/r/xanadu/employee-service-management

 Release :

    - xanadu

ft:locale :

    - en-US

ft:publication_title :

    - Xanadu Employee Service Management

ft:clusterId :

    - emplsm

bundleId :

    - emplsm

workflow :

    - Employee


---

# Synchronize past reservations

# Synchronize past reservations {#ariaid-title1}

* Release version: Xanadu
* 
* Updated August 1, 2024
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Sync reservations made in the past, that is, before configuring the reservation synchronization setup.

## Before you begin

Ensure that the calendar provider is active.  
Note:  
In case of Microsoft Exchange On-Premises, ensure that the reservations that you want to sync from the past are not above 1000 per room/resource. If in cases the expected number of past events are more than 1000, it is recommended to modify the system property sn_wsd_rsvsync.ewsPastSyncPeriodInMonths. Specify the value in months keeping in mind the expected past reservations. A single sync syncs reservations from those many months. Ensure that the specified number of months do not have more than 1000 reservations per room/resource.

Role required: admin

## Procedure

1. Navigate to AllWorkplace Calendar SynchronizationConfigurationCalendar Providers.
2. Select the calendar provider for which you want to synchronize past reservations.
3. On the Provider form, ensure that the Active option is enabled.
4. Enable the Sync past reservations field.
5. In the Sync start time, specify the start time from the past from when you want to synchronize reservations.  
   Note:  
   For Microsoft Exchange Online calendar provider, specify the Sync start time manually from the subscription record of the reservable sync record for which you are synchronizing the past reservations.
6. In the Sync end time, specify the end time from the past until when you want to synchronize reservations.  
   Important:  
   The past sync duration must not exceed 1825 days.
7. Select Update.

## Result

The past reservations are synchronized.
**Related tasks**   

* [Set Workplace Calendar Synchronization properties](https://www.servicenow.com/docs/vUvZOlsfMDRvfTWZlS9SFA "Configure the properties for the Workplace Calendar Synchronization to set the Exchange Online Sync Integration Mode to Strict, Personal Authentication, or Normal mode to synchronize reservations.")
* [Add a Reservable Sync Configuration](https://www.servicenow.com/docs/rF51D0p_OiLvvvq7U53gfg "Add workplace-workspace/desk (or) rooms that must be synchronized with the calendar provider whenever an employee makes a reservation.")
* [No request handling](https://www.servicenow.com/docs/ffLWnCeoM_59wxYDk~ZMGA "Make a 'No request' call to test the configuration with the calendar provider.")
* [Retrieve reservations](https://www.servicenow.com/docs/3HJQvL8btCKITpBXyXYf1w "Retrieves all the events for active reservable sync configurations from Microsoft Outlook to Workplace Service Delivery.")
* [Export reservations to the calendar provider](https://www.servicenow.com/docs/MB5NdB1YtKHqWJrBuUo9QA "As a one time procedure, export all your confirmed reservations to your calendar provider for synchronization.")  
**Related reference**   

* [Microsoft Exchange Online - Calendar synchronization](https://www.servicenow.com/docs/hoDjPQBOsaT14g89eyvNpQ "Synchronize reservations between Microsoft Outlook and Workplace Reservation Management.")
* [Google Calendar - Calendar synchronization](https://www.servicenow.com/docs/JJJ3SNxOsaU3Kv6AhxrKPA "Create a connection with Google Calendar and synchronize reservations made using the Workplace Reservation Management application. You can synchronize all the reservations that are made using the Workplace Reservation Management to the Google Calendar and vice versa.")
* [Microsoft Exchange On-Premises - Calendar synchronization](https://www.servicenow.com/docs/Me7rTD1VZaLuXJZb1SYWRA "Create a connection with Microsoft Exchange On-Premises and synchronize reservations made using the Workplace Reservation Management application. You can synchronize all the reservations that are made using the Workplace Reservation Management to the On-Premises calendar and vice versa. The reservation synchronization from an On-Premises calendar to the Workplace Reservation Management is performed using various approaches like subscriptions, synchronization tokens, events, and occurrences.")

*[\>]: and then