Calendar sharing

[Forester1965]

I've a client who I need to book appoints for straight into the diary. He uses Outlook and has a [e-mail] email address he runs through that. I use Office365 and Outlook as my email client.

I've used Calendly for other O365 solutions and just shared access with clients using Google Mail.

Is there an easy solution for me to do it with this one? Is it as simply as him sharing his calendar with me from within Outlook?