I Have the same problem on 2 computers (one has outlook 2013 and the ther 2016) in a pool of 125 computers.
all other computers seem to have no problem with is.
I solved it first by upgradeing from KES 10 to KES 11 but as soon as i configured the policy in the KCS, problem came back.
So the reply by Janith seems to make sense.
However, this is alomst ONE YEAR after this problem was reported by charbelseif for the first time on this thread...
HOWECOME THIS IS'NT SOLVED in the software patches by default?
Why do I need to spend hours of time searching for a sollution that shouldn't be a problem in the first place?
and even when i find a sollutin, i still need to request a Private Patch???
VERRY DISAPOINTED IN KES!