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Could Owa 365 sending errors be related with ESET?


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Good Morning

We are detecting some random errors while sending messages through OWA.

"too many concurrent connections opened" 

This happen randomly to few our users (2% of total) and NOT located in the same network. We are on Exchange Online and end users use Owa only

21-06-15-alba-cut.png.

Could this issue be related with our ESET Protect Server setting (mail scan or similar)?

I found this KB but it should be related to exchange on-prem 

Thank you  

Edited by GiovanniB
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Hello @GiovanniB,

 

Is the customer able to reproduce the issue on-demand or does it happen randomly?
I guess a system reboot resolves it, or?

 

If the issue occurs it would be worth checking how many connections are opened to the OWA.
If too many I would collect set of logs with ESET Log Collector and dump from ESET service (ekrn) and submit a ticket to have it checked.
 

Peter

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