XF 2.1 custom canonical link

[gouwepeer.nl]

I have content on my forum from another site (with permission), for which I want to link back to that site in exchange.
Now I want to avoid duplicate content by editing the canonical url (node id 85, 1286,1296 and 1285).
Template Metadata_Macros:
In it I added the following lines before <xf:if is="$siteName is not empty">

    <xf:if is="in_array({$forum.node_id}, [85,1286,1296,1285])">
        <xf:macro name="canonical_url" arg-canonicalUrl="https://www.horoscoop-hoekje.nl/" />
</xf:if>

Unfortunately this does not work. What am I doing wrong?

 

[gouwepeer.nl]

I have also tried it via template Page_Container, but without the desired result. Does anyone have an idea how I can get this working?

 

[Joe Link]

@gouwepeer.nl Did you have any luck with this?

 

[gouwepeer.nl]

Unfortunately not.

 

[Joe Link]

Just found this, it might help.

XF 2.1 - Custom canonical

We are working in integrating our site’s main backend and xenforo. One of the things we need is to customize the canonical url for threads (only threads in a specific forum) and some member pages (staff members), but we can’t figure out how to do this correctly: The first thing we tried was...

xenforo.com