Forum Discussion

pwlngs's avatar
pwlngs
Copper Contributor
Dec 29, 2021

Exchange 2016 Antimalwarescanning Antimalware scanning

Has anyone else had to disable Antimalwarescanning by running Disable-Antimalwarescanning.ps1 to get mail flowing again within the last few weeks? It has happened on 3 different exchange servers on different domains/ environments; 

 

Message's get stuck in que with the error "message deferred by categorizer"

 

Mail will not flow until you run the disable ps1 script, if reenabled it stops mail flow; 

 

Is this service needed? They already have a spam filter setup; 

What needs done to reenabled it?

2016
Exchange Server

5 Replies

  • lostDJ's avatar
    lostDJ
    Copper Contributor
    Jan 02, 2022
    Same problem. 3 different Exchange environments with 2016 and 2019. Seemed like it happened to me at midnight GMT last night. Y2K bug? LOL.
  • nick_ap's avatar
    nick_ap
    Copper Contributor
    Jan 01, 2022
    I’m curious how this bug started before 2022 and was not identified by Microsoft since seems related to the date of the signature and how it’s converted.
  • ANAND_SUNKA's avatar
    ANAND_SUNKA
    Brass Contributor
    Jan 01, 2022
    Hi,
    We also faced the similar issue with Exchange 2016CU20 today early morning.
    Suddenly it's stopped the mail flow.
    I was used below command and resolved the issue.
    Set-MalwareFilteringServer -BypassFiltering $True -identity <Server Name>
    But it's not good idea to disable or bypass the malware filtering.
    MSFT should release the fix.

    Anyways thank you.
    Regards
    Anand S

Resources