SD-WAN member interface not showing VLAN

Hi MohammedBahjat,

An interface cannot be configured as an SD-WAN member in any of the following cases:

Interface is already used in existing firewall policy or system zone.
Interface is already used as member of a switch or aggregate interface.
Interface is configured as an out-of-band management interface.

Find the interface’s references: In Network -> Interfaces, select the number in 'Ref.' column to bring up the References pane.

Please refer to the below document for more information:

https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Unable-to-add-an-interface-to-SD-WAN-Zone-as/ta-p/291666

You can also refer to the below document on how to add the interface in SD-WAN member without deleting references:

https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-add-the-interface-in-SD-WAN-member-without/ta-p/257907

If you have found a solution, please like and accept it to make it easily accessible to others.

Regards,
Aman