TylerSysadmins/techs, if you or a user is having trouble logging into Gmail via classic Outlook, close the app and remove the credentials from Windows Credential Manager. You should then be prompted to sign in the next time you open Outlook, after which it should work as expected.
Spent hours troubleshooting this issue for a client today, and this did the trick. Shoutout to Google Workspace support for the pointer. https://support.microsoft.com/en-us/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67
Spent hours troubleshooting this issue for a client today, and this did the trick. Shoutout to Google Workspace support for the pointer. https://support.microsoft.com/en-us/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67