Open the SharePoint app catalog. Open the link
https://{your-tenant-name}-admin.sharepoint.com/_layouts/15/online/ManageAppCatalog.aspx. Please replace
“{your-tenant-name}” with the tenant’s name
Select the Staff Check In-Out package > Click the deploy button in the ribbon. In the popup appearing,
check the “Make this solution available to all sites in the organization” checkbox & click the deploy
button
To consent with the app, follow the steps below
Open the page with admin permission:
https://login.microsoftonline.com/common/adminconsent?client_id=4f79179e-7a76-4812-86b2-b869b3be1dad
Login & click the Accept button. After clicking the Accept button, close the page (Ignore any
error displays)
Open the API access to approve all permissions request of the app
Open the SharePoint admin page > Advanced > API Access
