We are currently experiencing an “Invalid LDAP Server” error while trying to browse LDAP users on our FortiGate.Fortinet Support has confirmed that this is a known bug and the case has been escalated to the Development Team. However, there is no confirmed timeline or ETA for the fix, and no hotfix is currently available. Before waiting for the official fix, I would like to check:Has anyone else faced this issue?Were you able to find any temporary workaround?Did upgrading/downgrading firmware resolve it?Any CLI workaround or configuration adjustment that helped? Environment details:FortiGate model: 601FFirmware version: 7.4.9LDAP type: Active DirectoryError occurs while browsing users from GUIAny suggestions or shared experience would be greatly appreciated.Thanks in advance.

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Question

Invalid Ldap server

Forum|Forum|3 months ago
February 12, 2026
3 replies
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We are currently experiencing an “Invalid LDAP Server” error while trying to browse LDAP users on our FortiGate.

Fortinet Support has confirmed that this is a known bug and the case has been escalated to the Development Team. However, there is no confirmed timeline or ETA for the fix, and no hotfix is currently available.

Before waiting for the official fix, I would like to check:

Has anyone else faced this issue?
Were you able to find any temporary workaround?
Did upgrading/downgrading firmware resolve it?
Any CLI workaround or configuration adjustment that helped?

Environment details:

FortiGate model: 601F
Firmware version: 7.4.9
LDAP type: Active Directory
Error occurs while browsing users from GUI

Any suggestions or shared experience would be greatly appreciated.

Thanks in advance.

FortiGate

Toshi_Esumi

SuperUser

You should ask these questions to TAC through the ticket you have. They should have the answers. By the way if you are running 7.4.9, you must be seeing a big annoying warning in GUI recommending to upgrade it to 7.4.11 asap.

Toshi