Error when you try to run the Azure Active Directory Sync Tool Configuration wizard: "The Enterprise Administrator credentials that you supplied are not valid."

To resolve this issue, follow these steps:

1. Make sure that you provide credentials for an account that has enterprise admin permissions for your company's local Active Directory installation.
2. Make sure that you enter the correct user name and password for the user account.
3. Make sure that the computer on which the Directory Sync Tool Configuration Wizard is installed can communicate with your company's domain controllers and can authenticate to the local Active Directory.

Note The account must have enterprise admin permissions in the Active Directory forest to which the computer that's running the Directory Sync Tool Configuration Wizard is joined.

To check whether an account has enterprise admin permissions, follow these steps:

1. On a domain controller or computer that has the Windows Server Administration Toolkit installed, start Active Directory Users and Computers. To do this, click Start, click Run, type dsa.msc in the Open box, and then click OK.
   
   
2. Right-click the domain, and then click Find.
   
   
3. In the Name box, type enterprise admins, and then click Find Now.
   
   
4. Double-click Enterprise Admins, and then click the Members tab.
   
   
5. Check whether the user is listed in the Members list. If the user isn't in the list, one of the members of this list must log on and add the user to this list. Or, a member of this list can use their credentials in the Directory Sync Tool Configuration Wizard.