Hi @chrirene ,
Does the affected workflows require a connection settings in the action?
e.g. Are you using any Teams or Office 365 actions?
You will need to re-establish the links again as the previous connection is no longer valid due to the activation of the the Azure AD MFA.
Then Re-Publish the workflow. Any affected workflow instance will need to be rerun.
I use Nintex for O365.
So previously it was like this.
Then I use the connection and add from the list of my connection. I have added the new connection, but the workflow still errors and gets turned like this:
"The username is invalid or does not exist, or the password is invalid for the username specified."
Is it true that MFA not support with Nintex for O365?
https://community.nintex.com/t5/Technical-Issues/Office-365-Actions-Fail-With-Error-The-Username-Is-Invalid-Or/ta-p/86256
Hey, I think that you found the root cause of the issue.
Congrats for using Search to resolve your issue.
You need your Admin to configure the specific User or Service account so as not to use MFA.
This method should resume the affected workflows.
Otherwise get your Admin to configure a new User or Service account without MFA. You will also need to update the connection settings and Publish the workflow. This is more work for you.