At least two known issues so I would hold off on upgrading until Thursday.

@SmP  - what are the 2 issues?

Just take a look at the front page of this forum - more than a couple of issues at this point.

We had three immediate issues. ENFORCE STRICT CERTIFICATE VALIDATION and SMTP User Verification broke in this version for Incoming Gateways. Also the SmartHostSpamWeight and TotalSpamWeight appear to have been swapped, as the incorrect value is being passed from Incoming Gateways resulting in a huge increase of Spam that should have been caught and filtered.

All three of these issues affect Incoming Gateways, and I was able to figure out a workaround for the first two issues until SmarterTools get them fixed in an upcoming version, so I'm only stuck with one major issue. Thankfully we haven't experienced the other issues that some are experiencing with Build 8832 (knock on wood).