--- title: Add additional owners to any existing Calendar description: "GAT+ Google Calendar audit presents all Calendars existing on your domain. - Calendars - Calendar events - Calendar resources In **Calendars, ** the admin can **add** and **remove any additional owners** to any existing calendar owned by users of your domain. Thus allowing them to also add **Writers**, **Readers**,…" url: "https://gatlabs.com/knowledge/tech-tips/add-additional-owners-to-any-existing-calendar/" updated: "2025-11-28" category: "Users Audit & Management" tags: - GAT+ --- # Add additional owners to any existing Calendar GAT+ Google Calendar audit presents all Calendars existing on your domain. - Calendars - Calendar events - Calendar resources In **Calendars, ** the admin can **add** and **remove any additional owners** to any existing calendar owned by users of your domain. Thus allowing them to also add **Writers**, **Readers**, and **Free/Busy** **readers **to any calendar. ## Calendar permissions Auditing different Google Calendar Resource - **“Free/Busy Reader only”** – Read access to free/busy information. - **“Reader”** – Read access to the calendar. Private events will appear to users with reader access, but event details will be hidden. - **“Writer”** – Read and write access to the calendar. Private events will appear to users with write access, and event details will be visible. - **“Owner”** – Ownership of the calendar. This role has all of the permissions of the writer’s role with the additional ability to see and manipulate ACLs. They can be managed with Calendar permissions management allowing the admin to manipulate the users of the Calendar. ## Permission change Note: **Add** and **Remove** additional owners is possible, but removing the original (primary) owner is not allowed. **Admin can add and remove**: - The additional Owner (non-primary) - Contributor - calendar Writer - Viewer - Calendar Reader - Free/busy readers ### Add Additional Calendar Owner Navigate to **GAT+ (1) > Calendars (2) > Calendars** Select the **Calendar** needed > **click on "pen icon**" (3) under **Actions.****Calendar Permissions Management** window will be displayed. Owners, Contributors, Viewers, Free/Busy readers - select **Owners** tab to be able to amend the Owners lists. Under the **Owners** tab**(4)**file in the**Add user or a domain** field (5) by selecting or typing an additional Owner email address **>** confirm the change by clicking on**Add**button (6)**>**user/domain will be added under **Users**section (7) **>**click on**Save**(8) to add the user/permission to the selected calendar. ![GAT+ Calendar Permission Management window allowing to amend Calendar ACL list. ](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-1.png) ### Result An email notification will be sent. ![An automatic Calendar invite sent via email. ](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-2.png) The **user who is added as an additional owner** will **receive an email with a description** that are invited to the given Calendar. Once clicked "**Join shared calendar**" displayed in the email content, the user is redirected to the Google Calendar from where they can approve the invite by clicking on the **Add Calendar** button.![Add calendar message is displayed in Google Calendar UI.](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-8.png) Once the calendar is added by the user, the shared calendar will be visible under the heading ‘**My calendars**’. The newly added user will have **access to Manage events and sharing settings for the Google Calendar.** All additional owners will have full control over the original owner’s calendar. ![My Calendars section in Google Calendar UI. ](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-4.png) GAT+ allows also to delete the original owner from a **non-primary **calendar. **Note**: If the Calendar is **not a primary** calendar, meaning it is not the default calendar of a user, the Admins can remove the **previous owner entirely** after they have added an additional owner. ### Add Writers or Readers to existing calendars owned by users on your domain Navigate to **GAT+ (1) > Calendars (2) > Calendars** Select the **Calendar** needed > **click on "pen icon**" (3) under **Actions.****Calendar Permissions Management** window will be displayed. Owners, Contributors, Viewers, Free/Busy readers - select **Contributor** or **Viewer** tab to amend the Writers or Readers lists accordingly. To amend the contributors list, under the **Contributors** tab**(4)**file in the**Add user or a domain** field (5) by selecting or typing an additional Writer email address **>** confirm the change by clicking on**Add**button (6)**>**user/domain will be added under **Users**section (7) **>**click on**Save**(8) to add the user/permission to the selected calendar. ![GAT+ Calendar Permission Management window allowing to amend Calendar ACL list. ](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-5.png) When the user is added as **writer** or **reader** in the calendar permission, they will have access to those resources ### Results The added users will receive an email notification with an invite to the Calendar. The **user who is invited as Contributor** will **receive an email with a description** that are invited to the given Calendar. ![An automatic Calendar invite sent via email. ](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-9.png) Once clicked "**Join shared calendar**" displayed in the email content, the user is redirected to the Google Calendar from where they can approve the invite by clicking on the **Add Calendar** button. ![Add calendar message is displayed in Google Calendar UI.](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-7.png) The shared Calendar will be displayed under **My calendars**. ![My Calendars section in Google Calendar UI. ](https://gatlabs.com/knowledge/wp-content/uploads/2022/01/ACL-4.png)