In Office 365, you can add your own custom tiles to the app launcher that point to SharePoint sites, external sites, legacy apps, and more. The custom tile appears under the app launcher's All apps, but you can pin it to the Home apps and instruct your users to do the same. This makes it easy to find the relevant sites, apps, and resources to do your job.
In the below example, a custom tile called "CRM" is used to access an organization's CRM site.
Add a custom tile to the app launcher
In the Office 365 admin center, search for tiles or use the left navigation pane by choosing Settings > Organization profile > Add custom tiles for your organization. Click Edit
NOTE: If you don't see the Custom tiles link, verify you have an Exchange Online mailbox assigned to you and you've successfully signed into your mailbox. Both are required for this feature.
Choose Add a custom tile.
Enter a Tile name for the new tile. The name will appear in the tile.
Enter a URL for the tile. This is the location where you want your users to go when they click the tile on the app launcher. Use HTTPS in the URL.
Enter a Description for the tile. You see this when you select the tile on the My apps page and choose App details.
Enter an Image URL for the tile. The image appears on the My apps page and app launcher.
TIP: The image should be 60x60 pixels and be available to everyone in your organization without requiring authentication.
Choose Save to create the custom tile.
Your custom tile now appears in the app launcher on the All tab for you and your users.
Note: If you don't see the custom tile created in the previous steps, make sure you have an Exchange Online mailbox assigned to you and you've signed into your mailbox at least once. These steps are required for custom tiles in Office 365.
Edit or delete a custom tile
In the Office 365 admin center, search for tiles or use the left navigation pane by choosing Settings > Organization profile > Add custom tiles for your organization and click
Select the Title name and click Edit title
Update the Tile name, URL, Description, or Image URL for the custom tile.
Click Update > Close.
To delete a custom tile, from the Custom tiles window, select the tile, click Remove tile and then click Delete.