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EliasBrendan-1001 asked EricYin-MSFT commented

how long should a mail take before i log a call with MS

I need to know what is the time limited on a mail delay

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Hi,
Would you be more specific about what happened?
Like your Exchange version, sending internal or external, can be reproduced?
If you only want some information about that, this official doc should help: Message retry, resubmit, and expiration intervals



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I had a user that had a mail that took 90 sec and I just need to know what is the time MS set that is with in tolerance.
We have a hybrid system
Exchange 2016 and Office 365

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Hi,
There are many reasons that a message is delayed, we should figure out where the delay happens during the whole mail flow.
Is the user located in Exchange 2016 or O365? And is the recipient an internal or external user?
Is your MX record pointing to Exchange online or on-premise Exchange? See Transport routing in Exchange hybrid deployments.
Track the message as docs suggests: Search message tracking logs Trace an email message


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I am writing here to confirm with you how the thing going now?
If you need further help, please provide more detailed information, so that we can give more appropriate suggestions.


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