Office 365 Integration with ORC - Need additional documentation for customer IT Team

Summary:
Customer IT Team is looking for additional documentation on Office 365 Integration with ORC

Content (please ensure you mask any confidential information):

We are in fresh new implementation for ORC, where we have few question relating to Office 365 integration with ORC.
Customer IT needs to Know why below access is required for ORC Integration with Office 365.

o Calendars.ReadWrite
o User.Read.All

Customer IT also needs to know why Calendar Name is required. Please suggest/share any document which has answer to the asked questions.
Which can be shared with customer IT team.

Note- Attached is the reference document which we have shared with customer IT team, besides they still need input on the above mentioned questions.