“incorrect authentication data” (error code -17900)

23. January 2013 · Write a comment · Categories: Outlook for Mac · Tags: , , ,
Although I have entered the same authorization information for all five of the other Earthlink alias accounts, I constantly get this error every ten minutes for my "Information Desk" account. No matter what i do it persists.

Strangely, it did allow sending an outgoing message but still continued posting the "error" message. Help!!!

This began only a few days ago even though these accounts have been in use for years.

Do you think this is an Outlook problem or an Earthlink problem?