Hi Dhara,
This might help you.
docs.microsoft.com/.../deploy-dynamics-365-app-for-outlook
The following are required to use Dynamics 365 App for Outlook:
Email Server
Exchange Server 2013 CU 14 or greater
Exchange Server 2016
Exchange Online
Email Client
Outlook 2019
Outlook 2016 (MSI) version 16.0.4266.1001 or higher (on Windows 7 or higher client OS with IE 11 installed)
Outlook 2016 (C2R) version 16.0.93330.2073 or higher (on Windows 7 or higher client OS with IE 11 installed)
Outlook 2013 (MSI) version 15.0.5023.1000 or higher (on Windows 7 or higher client OS with IE 11 installed)
Outlook for MAC
Outlook for iOS (Apple iPhone 6S or higher, running iOS version 8 or higher)
Outlook for Android (with Exchange Online, on Android phones running Android 4.4,5.0,6.0,or 7.0)
Note Support for 2013 versions of Office 365 ProPlus ended February 28, 2017
Browser (Outlook Web Access)
Micosoft Edge (with Exchange on premise 2016 or higher and Exchange Online)
Internet Explorer 11 (with Exchange on premise 2016 or higher and Exchange Online)
Google Chrome
Mozilla Firefox
