Delay to send mails to Exchange Online mailbox
Hello, We have configured an hybrid Exchange 2013, our Mx points to our local anti-spam solution. When i send mails to On-Premises mailbox, i receive the mails without delay. But when i send mail to Exchange On line mailbox I notice slowness that can go up to 30 20 minutes Have you any idea about the root cause of this problem Thank you for your help