Office 365 - Can you navigate between calendar and email?
Yes, if you are using the Outlook client, you can click on the links (available in version 2013) or the icons (available in versions 2016 /2019) in the lower left corner to switch between Mail, Calendar, People (Contacts), Tasks and more.
Outlook Web Interface
If you are using the web version, you can click on the App launcher icon in the upper left corner to switch between applications or click on the icons in the lower left.
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