Error: "Account already exists" when adding a functional mailbox in Outlook for Mac


You receive the following message when attempting to add a TechMail functional mailbox account in Outlook for Mac:

Account already exists.

example screenshot


You are attempting to add the mailbox directly in the Accounts window. A functional mailbox must be added under an existing account.


Follow our published instructions for adding a functional mailbox to Outlook for Mac.


You will be able to add the functional mailbox when using the proper instructions.