Cannot access e-mail in Outlook...error 0x800CCC0E

Question

Cannot access e-mail in Outlook...error 0x800CCC0E

Bob Pakenham 20

I had to update my password for ******@att.net and can no longer access e-mail getting error code 0x800CCC0E. I have

been unsuccessful getting Outlook to prompt me for my e-mail address and password.

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Answer 1

Jeronimo Fuerte 46,765 Independent Advisor

Since this is an @att.net account, the most likely cause is that Outlook kept the old sign-in token after your password change. In classic Outlook, some Yahoo/AT&T-type accounts can stop syncing with 0x800CCC0E after a password change because Outlook does not immediately prompt for new credentials; sometimes the prompt appears after about 1 hour, but you can force it by closing Outlook, opening Credential Manager from the search in the task bar then on Windows Credentials, removing the MicrosoftOffice16_Data:OAUTH2 entries for the affected account, and then reopening Outlook so it asks you to sign in again.

Bob Pakenham 20 Reputation points

2026-04-22T00:31:30.2133333+00:00

Jeronimo -

I found the info you referenced previously and it did not help. I also performed the additionally referenced

material in that same service tip. It also did not help as my primary e-mail address was not listed. I have had

this problem with 0x800CCC0E errors before with this battle between att.net and Outlook...just can't remember for sure how to fix. Any additional input is welcome.

Bob