Management at Ursa Major Solar wants to understand how many accounts have opportunities in the...

The Show Unique Count option on the account name column will create a report showing all open opportunities and the total number of accounts represented. This option will count each account only once, even if it has multiple opportunities. The report can be grouped by account name or any other field to show more details. References: https://help.salesforce.com/s/articleView?id=sf.reports_builder_unique_count.htm &type=5