When others join a file sharing workspace as members, they immediately gain access to all of its content. Likewise, you immediately gain access to all content that other members add to the file sharing workspace. You can:
Invite people by selecting their Groove contact, if they're already using Groove.
Send the invitation by email if you know that the invitee does not yet have a Groove account, or if you can't find the invitee's Groove contact. For people new to Groove, this is the most common way of sending workspace invitations.
In the Synchronization Tasks pane, click Invite someone to open the Send Invitation window.
Enter the invitee's email address in the To: field.
If you want, add a message in the Message box.
For example:

Note that in addition to your message text, information on how to download
and install Groove will be automatically added to the message.
Click Invite.
The invitation message is sent to the invitee's mailbox. Once the invitee
opens and accepts the invitation (after downloading and installing Groove,
if necessary), the file sharing workspace is downloaded to their computer.
Using an instant message invitation is the preferred invitation method because it allows you to track the status of the invitation. However, you must have (or be able to find) the invitee's Groove contact to send this kind of invitation. You can also send an email invitation as described above.
The task below describes the process for searching for other Groove users and sending them an instant message invitation.
In the Synchronization Tasks pane, click Invite someone to open the Send Invitation window.
Click the Add More... link to open the Add Recipients dialog box.
Click Search for User... to open the Find User dialog box.
Enter search text in the Find User text box.
Note that you can search for contacts by name, email address, or city.
As a rule of thumb, it's best to enter search text that's not overly common
so that you won't have too many choices in the search result.
Select a search directory from the drop-down menu.
The Groove.net Directory is the public directory where all Groove users
(optionally) list their Groove contacts. If your workplace has deployed
Groove, you might also see a company directory.
Click Find.
Select a match, if found, and click OK.
Click OK in
the Add Recipients dialog box.
The Groove contact is added to the To: address box.
If you want, add a message in the Message box.
Click Invite.
Groove sends the invitation and posts alerts above the Groove taskbar
icon to help you track the progress of the invitation.
The next and final document in this guide provides links to more information on using Groove.
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