Invalid Password when authenticating admin via LDAP

Hey all,

Just getting our Fortigate 601e on FoS 7.0.1 set up, first time working with Fortinet. When attempting to log in via my own domain account, I get a message saying Authentication Failed, and when viewing the logs, I see the following:

3 Minutes ago: Administrator (user.name) login failed from https(10.x.x.x) because of invalid password.

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35 Minutes ago: Administrator user.name logged in successfully from https(10.x.x.x)

Under LDAP Servers, I have one of our DCs configured. Using the IP address, sAMAccountName, Regular bind type using cn=, ou=, etc. When testing connectivity or user credentials, both test as Successful. 

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I've configured a Remote User Group called FortiAdmin, Type: Firewall, and added the Domain Admins group. 

I created an Admin Profile called FortiAdmin with all permissions. Lastly, I created an Administrator called FortiAdmin: Match all users in a remote server group, with FortiAdmin for both the Administrator profile and Remote User Group. 

I feel like I'm missing a step here. Any thoughts are appreciated!