Account Source field is not available within Standard Report Activities with Accounts
|Knowledge Article Number||000206769|
|Description||Account Source field is not available on "Activities with Accounts" Standard report type
Account Source field is hidden by default to all profiles including the system administrator. Hence this is not visible in any of the standard report type on accounts.
|Resolution||To have the "Account Source" field visible on account reports do the following steps:
Making the Account Source Field visible to required Profile
Refer to the following document - Custom Report Type
Now build a report on this report type and you can add the Account Source field to this report