Hi Brian!
The problem we encounter after upgrading from version 8930 to any of the new "POST LINUX" versions (even though we still use Windows...) including the latest 9119, concerns MS Outlook (2016, 2019, 2021, 365...) connected via MAPI.
In practice some users (actually a few, but some of them are important and therefore we cannot update...) encounter various synchronization problems (some cannot move mail from one folder to another, others cannot send mail and others still have MS Outlook completely blocked...) that seem to be related to this type of error (in the MAPI LOG):
<<<<<<<<<<<<<
[2024.12.16] 08:54:49.859 [{1CB91AB4-267E-4F25-9978-2CF0D61531BB}:8] [giXXX.zaXXX@miXXXXXX.it] Exception: System.OverflowException: Value was either too large or too small for a UInt16.
[2024.12.16] 08:55:00.760 Exception: giXXXX.zXXX@miXXXX.it RopResponseBuffer CachedPayloadBytes.Count is greater than Int16 [71818]
>>>>>>>>>>>>>
This happens with ALL versions after 8930, and always with the same users.
The problem is solved immediately (the errors disappear and all MS Outlooks start working correctly again) as soon as we downgrade and return to the 8930 release.
In the ticket that I still have open, Jereming Chen (of SmarterTools), after working a bit on one of our on premise servers, confirmed that he was able to replicate the error and that he had collected all the data necessary for SmarterTools to solve the problem...
Let's hope so...