Dual delivery with GSuite and sent folder

Dual delivery with GSuite and sent folder

Hello,

we had configure the dual delivery with GSuite as primary server. The problem is, the sent folder don't show sent emails in both systems.

Example:

sent email from zoho mail. I can't see it in sent folder in GSuite.

I sent email from GSuite, i can't see it in sent folder in zoho mail.

Why this doesn't work? We followed the instructions. 

Thank you.