Share Workload to Manage SharePoint Online External Users
Cloud technology is undoubtedly going to reform how businesses will be using IT — if they even have an in-house IT department. If your company does have an in-house IT department, unburden your IT staff from tactical stuff so they can focus on strategic activities by redistributing typical IT tasks to the end users.
If you don’t have IT, no worries. You don’t need to spend money on an IT consultant to do simple tasks, such as allowing team site owners to invite external users to collaborate on SharePoint Online.
With your admin privileges, you can set the stage to minimize hand-holding by allowing external access to SharePoint Online from the administration center. To do so, follow these steps:
Log on to the Office 365 portal.
Under the Admin tab, click the Manage link under SharePoint Online to take you to the administration center.
Click the Manage site collections link.
On the right pane, select the site collection you want to make available to the external user.
From the radio buttons that pop up, click Allow and then hit the Save button.
After you do this, team site owners are now able to configure their own team sites to invite external users by going to Site Actions, Share Site, and then entering the e-mail addresses in the Share your SharePoint Site dialog box.