Microsoft Outlook is perfect tool for Business purpose.
You can create or edit contact list, create groups, connect top people easily, share important news & documents by outlook.
Get Microsoft Office setup here : office.com/setup
How to Create a Contact or Contact List:
Go to Outlook.com
Select People at the bottom of the page.
Under Your contacts in the left pane, select the folder that you want to create the contact in.
On the toolbar, select the New down arrow > Contact or Contact list.
Enter the details for the contact or contact list.
Get office 365 : Office Setup
How to Edit a Contact or Contact List:
In Outlook.com, select the app launcher > People tile.
Select the contact or contact list that you want to edit, and select Edit.
Make the changes that you want.
For more details, visit : www.office.com/setup