You can only integrate your Lawcus account with either an Outlook or Google email calendar at any one time. However, you can map multiple calendars to Lawcus as long as the latter are from the same email service provider as the integrated email account.
So, if you've integrated a Gmail account with Lawcus, you can only map multiple Google calendars with such a Lawcus account. But if you integrated an Outlook email account with Lawcus, you'll only be able to map multiple Outlook calendars.
Mapping multiple calendars with Lawcus
To integrate Lawcus with multiple calendars:
Share with or add the additional calendar to the email account integrated with your Lawcus account, with full permissions.
Note: The process for sharing a calendar with full permissions with another email account differs depending on your email service provider, so ensure to search the specific process for sharing your calendar.
In this example, an additional Google calendar is being shared with the Gmail account integrated with the Lawcus account.
Go to Lawcus Calendar to create a new calendar
Navigate to Settings to enable Two-way calendar integration, if isn't
Click the Update Calendar list button
Map the additional email calendar to Lawcus by selecting it from the dropdown list, then go to Lawcus Calendar to check out the newly mapped calendar