Hi UHayat,
As I understand, you want to integrate Office 365 Calendar with CRM. Have you try to contact our Dynamic CRM team? If not, please let do that we have a dedicated Microsoft Dynamics CRM Product Forum will help you find solution if you are having any difficulty with setup on integration between Office 365 Calendar with CRM. You can ask any question about your issues and solutions. Our experts’ team will help you to find the solution that fits your needs.
Thanks for your understanding.
Best regards,
Shyamal