Installation of applications from app catalog
Only SharePoint Administrator can install the applications. Administrator can make a member an admin.
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Go to https://your tenant
name-admin.sharepoint.com/_layouts/15/online/TenantAdminApps.aspx.
- This displays the Apps page.
- Click on App Catalog as shown in below.
- Click on Apps for SharePoint as shown in below.
- This displays the Apps for SharePoint page.
- Click on upload, choose your file and upload the file.
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First open your site collection where you need to install your app, click on
site content and then click on Settings gear icon.
- You can either click on Add an app or App under New.
- This displays the SharePoint apps page.
- You will navigate to the page where ADD is visible as shown in below, click on it.
- And finally click on Trust it, application starts installing.
- Once application got installed you can check in Site contents.