When logged in as the admin there is a "Import Contacts" option.
Once you click on this you are taken to a page where you can upload a csv file of Members you want imported.
First, you have to login to your system. Look for and click the import contacts link.
Then you will be redirected to a page where you have to upload the CSV file containing a list of the contacts to upload.
And once you've uploaded the file. Scroll all the way down, and from there you will see a dropdown for the contact groups. So each contact groups have different sets of autoresponder messages.
1- Login to your client admin then go to Advanced features
2- Click on the Misc tab, in the import contacts field change to yes (allow Members to import contacts themselves).
Yes, there is a page which you can make available to your members allowing them to import contacts one at a time.
The page is located at: yourdomain.com/admin/contactadd
You can control how many contacts a member is allowed to add through this page per a day in advanced features.