User accounts can be added to Lync Online/Office 365 using a comma-separated values (CSV) file. The CSV file must be specifically formatted with the correct column headings to be successfully imported. To facilitate this process, Microsoft provides a sample CSV file with the appropriate column headings that can be downloaded from the Online Portal and then adjusted using a text editor.
The following steps describe the process for downloading the sample CSV file, editing the file, and then importing it into Lync Online/Office 365:
1. Log on to the Office 365 Portal.
2. On the left side of the main page, click Users and Groups.
3. At the Users and Groups page, click on the Bulk add symbol, which is just to the right ...