How do I add Salesforce plugin to outlook?

Hi! Huan,

Please follow the below steps:

Installing the Salesforce Outlook Add-in (Mac)

• If you have Microsoft Outlook open, close it
• Navigate to the Office 365 website ‘Manage Add-Ins’ Page: (https://outlook.office.com/owa/?path=/options/manageapps)
• Find Salesforce in the add-in in the list and check the box in the Turn On column
• Wait about 15 to 20 seconds and then open Microsoft Outlook
• The Salesforce add-in should appear on your Outlook ribbon

Configuring the Salesforce Outlook Add-in

• Click on the Salesforce Outlook Add-in on the Outlook ribbon (toolbar) to open it
• If you’re using the web version of Outlook you can configure the add-in by clicking on the Salesforce Outlook icon
• Make sure ‘Production’ is selected for the Environment
• Click on “Log In To Salesforce”
• Click on ‘Use Custom Domain’
• You will be logged into Salesforce inside Outlook the add-in
• Once you’ve activated and configured the Salesforce add-in it will be active and configured in all versions of Outlook, both desktop and web versions.

I hope you find the above solution helpful. If it does, please mark it as the Best Answer to help others too.   

Thanks and Regards,  

Suraj Tripathi