Samsung Flip 2 (WM55R/WM65R) - LDAP query truncates requests?

Question

Hi. I am trying to get our Flip2 to use LDAP when sending email.

However, it seems that LDAP requests are being truncated before they reach the server.

I can SEE the LDAP requests coming in, in OpenLDAP running on my MacOS just fine. However, the server displays an error of

invalid dn: "o=example-domain,c=com

Of course this is wrong, so I agree with the service. However,
On my Flip2, I have correctly configured this test example in the Settings/Connect/Advanced/LDAP
to set the userID to

cn=admin,dn=example-domain,dc=com

(I installed a test LDAP server to try to debug this issue, I used these values. The server gives good results to an LDAP client called LDAP Admin Tool, so I believe it is correctly installed/datapopulated and working).

On this LDAP configuration screen, on the Flip2, the TEST button succeeds. However, when I send emails, the LDAP server reveals these log traces:

64cd579e.1f200c50 0x16e987000 conn=1045 op=1 do_search: invalid dn: "o=example-domain,c=com"

Any suggestions for me?

Does LDAP client in Flip2 truncate requests?

Note that when I test with a different client (i.e. the Mac version of LDAP Admin Tool) requests are accepted and the server returns the correct result.

Please help!
And thanks in advance.

Shawn
__
Model WM55R. ModelCode LH55wmrWBGcXEN. Version No. CB04. Latest firmware Tizen 5.0 OS, version 1240

Answer

We have tested the whole thing with a Windows Server 2016. For this we created 2 TXT files (LDAPConnectionConfig.txt, LDAPQuery.txt) on a USB stick. The LDAP server is without SSL certificate.
Here is the configuration we used for testing. During the setup we noticed some stumbling blocks such as in the LDAPQuery where the variables must be defined for a single attribute etc. As well as the order of the BASE DN. We always tested this with the ldp.exe tool from Windows server.

LDAPConnectionConfig.txt

- User ID=test\Administrator
- Server Address=192.168.100.200
- Server Port Number=389
- Base DN=CN=Users,DC=test,DC=intranet
- SSL/TLS=Don't use
- Use Untrusted Certificates=Use
- Authentication Type=Basic

LDAPQuery.txt

- UID=distinguishedName
- Email=mail
- Name=givenName
- Last Name=sn
- Position=directReports
- Company Name=company
- Department=department

Query

Query=(|(mail=*<A>*)(sn=*<A>*))

Brief instructions on how it worked for us.

Plug the USB stick into the Flip.

Open the settings -> Connect -> Network -> Network status -> Ip address settings -> DNS server
Adapt the DNS server to the domain controller or the configured DNS server here.
Open the LDAP configuration:

Use LDAP: Set Do not use. Menu → SETTINGS → Connect → Advanced settings → Enter password → LDAP → Set up LDAP connection → Use LDAP → Use

Import setup value
Enter password
Test
Ok

LDAP query configuration

Use custom query
OK

LDAP query truncates requests?

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