If a user is unable to login to My1Login, below are a simple set of checks to troubleshoot. 

1. Valid User: Check the user is registered with an account associated with your company. This could be either an email account or an Active Directory account. You can check their status in the user section of the Administration Portal. 
2. Correct Group: For Active Directory accounts, check that the user is placed into the correct group on your Active Directory and the Active Directory Connector has synced since this action has taken place.
   
3. Passphrase Change: If a user has changed their Active Directory password and are not able to login, the cause of this could be that a sync with the Active Directory Connector has yet to happen.