Trying to setup AD authentication getting error Invalid credentials errno:49 (4290636)

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Title

Trying to setup AD authentication getting error Invalid credentials errno:49
Description

Trying to setup AD authentication in AAA| Settings, clicking the Test button shows the following error pop-up: Error establishing LDAP connection IPaddress:389 Invalid credentials.
Cause

Invalid DN path to the user in the Bind DN field. or Invalid password for the account in the Bind Password field.
Resolution

1 - On the DC go into powershell and check the DN of the user with the following command:
Get-ADUser -Identity username -Properties DistinguishedName

2 - Check the password of the username is correct.

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