Open the appcatalog page with the below URL.
YourTenantName – Replace your tenant’s name from the above URL.
- Click on classic experience as shown below.
- Select the Helpdesk 365, click on Files and then Upgrade Store App.
- Once you click on the Upgrade Store App button, , it would be redirected to the below page, finally click on the Deploy button.
- You can verify the application version in the App Catalog and Helpdesk 365. In both, the application version must be the same.
Now select the Helpdesk 365, click on files and then the deploy icon.
Now unselect the check box and finally click on deploy button.
Only SharePoint admin can upgrade the application.
If you want to make this application available for all sites, you can select the check box and then click on the Deploy button.