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Exchange 2016 not delivering mail to mailboxes
I have a recently installed Exchange 2016 server that I migrated from Exchange 2010.
The Exchange 2010 is still in the environment for now.
Everything has worked well for about 6 days until today, I can get incoming messages but they are not delivering to the mailboxes and when sending an email, they aren't going out to the recipients.
Nothing has changed and overnight this problem started.
This is what my queue viewed looks like.
I've checked hard drive space and that is adequate, just not sure what's going on.
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Keep your eye out for a fix - it’s to do with a long signed integer storing a date, and will need a permanent code fix so we can turn malware scanning back on.
More details:
https://www.alitajran.com/exchange-mail-flow-breaks/
https://www.alitajran.com/exchange-mail-flow-breaks/
There is a fix out now...
https://techcommunity.microsoft.com/t5/exchange-team-blog/email-stuck-in-exchange-on-premises-transport-queues/ba-p/3049447
It resets the scanner signatures.
https://techcommunity.microsoft.com/t5/exchange-team-blog/email-stuck-in-exchange-on-premises-transport-queues/ba-p/3049447
It resets the scanner signatures.
If you look at what it does I'd be wary of calling it a fix... it's more of a workaround by Microsoft. They are now updating the definition date and keeping it below the long integer threshold. I suspect a patch to fix the variable type will be issued sooner or later and then without that patch, this could break again... I'd recommend making sure folks stay on top of Exchange patching (I'd recommend that anyway, but especially in this case).
Looking at it it seems to remove the old files and downloads new... The new files are supposed to be "the fix"...
The new files are the temporary fix for now. The code of the Malware Engine update signature checker (not the malware engine itself) will need updating.
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