Delay to send mails to Exchange Online mailbox

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New Contributor

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

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