It's funny that this concerns both PDF and O365 so it's more unlikely that the cause is related to these application or document type. Same goes for
the network if you ave the same issue with printing from USB (otherwise one might recomment to fiddle around with the network speed).
Does the client have just one PC or can you test and reproduce it with other computers within the same network? If not hook up your laptop in to
the clients network and give it another try starting with the same Adobe Reader version and PDF file.
Even if the MPC307 worked: If the problem is only reproduceable from one PC it is very very likely that something on that end is the cause and seems to trigger the issue.
IMC controller generation might react different compared to the previous one - we all know that "newer" isn't always "better"^^
It might be helpful to run a driver cleanup tool and reinstall the drivers from scratch.
Before that you might try and purge all remaining spooler data:
Run CMD as admin and then run these three commands:
Code:
net stop spooler
del %systemroot%\System32\spool\PRINTERS\* /f /s /q
net start spooler
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