The best way to give access to your Virto calendar is through SharePoint. You can add an external user to your SharePoint site and provide them access to view or edit the calendar there.
First, go to the SharePoint site you want to share.
Once there, click the “Members” button.
Then, click “Add members“. Find the “go to Outlook” hint In the pop-up and click on it.
In your Outlook that opens, click “See all members.”
Then, click “Add members” on the right side of the screen.
Provide the email address of the external user with whom you wish to share the site. Click “Add” once done.
The external user will receive an email invitation to access the site (by clicking “Go to SharePoint” in the email).
They must log in with their email, enter a single-use code sent from Microsoft via email, and accept the permission request.
Users can view the site and its content, including calendars hosted on this particular site.
Users will only see (and edit, if allowed) the Virto calendars on a site they have permission to view. They will not have access to all the calendars your organization may have within the same tenant.
