Forum Discussion
Lot of eventID 4999 related to ActiveSync on my Exchange Servers
Hello all, I'm Vincent and I'm Exchange administrator in my International Research Organization. Our Exchange farm is composed of 4 Exchange Server 2016 Enterprise CU 22. I recently noticed a l...
Wow! Now, i'm very thankful that there is somebody sharing this experience and impression/feeling of the very source ^^
Yes, I'm also 99% sure that this relates to the combination of EXCH vdir <> FW/LB <> ActiveSync requests/sessions. I can even find this reflecting in the event logs, when the errors starting as soon as the users are off to the weekend or coming back from weekend again. I also played a lot with the http session timeout setting on fw/waf side but without any success, not even little changes in the amount of logged errors.
Even following very clear recommendations for EXCH + SophosXG - no effect at all.
The main issue is, from my perspective, that these errors don't cause significant issues, at least not on my side. From time to time some few users complain about "sync hangs" on their mobiles but that's it. Exchange seems to be fine whith recycling the app pool every hour ......
However, i'm annoyed about it because it's just filling up my event logs and leaves a bad feeling while not really knowing what's going on.
Yes, I'm also 99% sure that this relates to the combination of EXCH vdir <> FW/LB <> ActiveSync requests/sessions. I can even find this reflecting in the event logs, when the errors starting as soon as the users are off to the weekend or coming back from weekend again. I also played a lot with the http session timeout setting on fw/waf side but without any success, not even little changes in the amount of logged errors.
Even following very clear recommendations for EXCH + SophosXG - no effect at all.
The main issue is, from my perspective, that these errors don't cause significant issues, at least not on my side. From time to time some few users complain about "sync hangs" on their mobiles but that's it. Exchange seems to be fine whith recycling the app pool every hour ......
However, i'm annoyed about it because it's just filling up my event logs and leaves a bad feeling while not really knowing what's going on.
Hi BroBias7 and cmillerLCE ,
Sorry for the late answer but I have to admit that did not take this error in account because ActuveSync is just working fine.
On our end, we also use a load-balancer (F5 Big-IP) so it is probably something to investigate deeper ... or not.
On my side I decided to stop my investigation.
Good luck guys !
- Running Exchange 2019 three node DAG with FG Big-IP LB.
Same issue here ... no progress on it though.
