Firstly you will need to select Exchange as the external calendar you wish to sync your Appointedd account with:
Hover over the Connect tab and select Sync your external calendar
Click the orange Connect calendar button
Click Connect your calendar and select the resource whose calendar you wish to sync:
Choose Exchange from the list
You will then need to log in to your Microsoft Exchange account. Remember that you are logging in to the account where you manage your company calendar/availability.
If you have a single calendar associated with that account, you’re all set!
If you have more than one calendar being pulled in to that account, you will need to select which calendar to sync and press the Sync Now button. Take care to select the calendar where you are recording your availability for your company.
Once chosen, you’re all set!