Office 365sUnable to Authenticate Your Credentialsis not a frequent error code but its definitely a very annoying one.
Contents
How to Fix Office 365 Credential Authentication Errors
1.
Enable TLS 1.2
If youre using MSolService, check that TLS 1.2 is enabled.
Check your user name format
double-check youre not using an incorrect format for your user name.
The correct format to use is the following:<user_name >@.
see to it there are no typos either.
Keep in mind that Microsoft does not support the Azure AD Module for Windows PowerShell.
Disable Active Sync
ActiveSync is a useful protocol that synchronizes the Exchange mailbox with mobile devices.
We hope one of these solutions helped you to fix this Office 365 credential error.
However, if the error persists and you need help, contact Microsoft Support.
