Redirect send emails to other mailbox

Hi There,

I have the following case for a client of ours, i will use my own mailbox as example:

I would like to redirect all the emails that i send to someone else, so when i send an email to someone i wan't it to be automatically redirected to my colleague so that he can see all the emails that i send.

I want to do this with a Transport rule or outlook rule from Webmail, but the only rule i can find is in the Outlook dekstop app and it only applies to the local client.

Is there a way to do it from the Office 365 Exchange portal or webmail?

Kind Regards,

Mazen