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AMSI Problem mit Exchnage 2016 CU 21

Hallo zusammen,

weiß irgendjemand ob es schon einen Workaround bzw. eine Lösung für das AMSI Problem beim Exchange 2016 CU  21 gibt?

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  • Hello,

    I've also had this problem with Outlook client connectivity slowing down dramatically since installing Exchange 2016 CU21.  I disabled in web.config as you advised, but still had the problem.

    I have cases open with Microsoft and Sophos; impossible for me to tell who's issue it is at this point.

    I disabled AMSI on the agent with the "override" feature, as advised by Support.  Waited a while for the change to go through, but the Outlook connections remained slow.

    Finally, today I decided to disable AMSI on my Exchange Server by policy from Sophos Central.  This time it worked!  Outlook connections are fast again.

    Obviously this is a workaround.  I hope engineers at Sophos, Microsoft, or both can determine the root cause and fix it.  This is an important feature that I'd like to have enabled.

  • The processes in question would need to have restarted I suspect once the policy arrived such that the Sophos AMSI dll wasn't pulled into the process.

  • That's a good point, and I don't recall if we did that or not.  an IISRESET after disabling AMSI on the endpoint probably would have done it.

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