Adding Office Calendars to Outlook Steps to Add the Office 1 Conference Room Calendar Open Outlook. Navigate to the Calendar tab at the bottom of your screen. Right-click "My Calendars" to see a list of company calendars.If you left-click, all available calendars will be selected. Check if "Office 1/2 Conference Room" is listed. If available, select it. If not, proceed to the next step. Manually Add the Calendar: Click "Add Calendar." Select "From Room List." A list of available company calendars will appear. Locate and double-click "Office 1 Conference Room." Click "OK." The calendar is now added and can be selected/deselected.