LDAP Setup using Active Directory

I have everything working for a user logging into the site. However when I try and authenticate the user against a group, it does not work.

Server: XXX.lan - this is all working
user dn: DC=XXX,DC=lan
Bind

Group DN: OU=SuiteCRM,CN=SecurityGroups,DC=XXX,DC=.lan
User Attribute: uid
Group Attribute: memberOf
GroupName : OU=SuiteCRM
With UserDN Checked.

My authentication is turned on and is using a windows service account.

Everything works when Group Membership is unchecked. However, when it is turned on wiht the setting above… Failure. The log says can’t authenticate user against group. I have checked and I am 100% sure that the user is in the AD group.

Any luck with this? I’m just trying the same…

User Attribute: dn
Group Attribute: member
With UserDN Checked.