This right here is exactly why I hate doing only break fix T/M work for people. I have been fighting with this strange intermittent issue for a law firm that only calls me when something is broken, the person on staff who "knows computers" can't fix it and it has been annoying them.
Case in point:
The issue I am fighting is intermittent and happens in Word/Excel/Outlook sometimes and there is no identifiable way to consistently recreate the issue. Sometimes it's there, and sometimes it's not. It has been going on somewhere between the last 4 - 8 weeks. They have a mix of configurations on their machines, no consistent AV (they use a variety of free ones), and all the machines have Windows update to install automatically. What happens is there will be a dialog box that will pop up when attempting to attach a file in Outlook, or save in Word/Excel that says "trying to connnect to \\servername\sharename\foldername" sit for a few seconds and either connect or the application goes not responding.
I have checked DNS, reviewed every BPA on the server, reviewed any known issues with updates (all the desktops are at a different level of patch too because some people "don't want to reboot"), done full repairs of Office, removed add-ins, full anti-malware scans, removed unnecessary networking equipment (5 port netgear switches apparently are reproductive in this environment), and even swapped their main switch with a known good one.
This stupid issue is still going on, and I am at a complete loss as to why. It isn't all users, but it is across about 50% of them. Different versions of Windows, different update levels, etc. I ran the Office Configuration Analyzer today and correct any errors it had, but I don't know if it is fixed. The only things I haven't done are:
1. They apparently have another 16 port switch at the far end of the building that is old as dirt that I haven't swapped out yet
2. Gone through each machines update list to see what common updates they have are
3. Gone through all network folders to make sure they haven't changed any permissions.
Other than that I am at a complete loss. The biggest issue is a lack of time frame for the issue, so I have no idea how far back in the logs to look. I have looked at the server logs too, and the only thing consistent in the last 2 months are Schannel errors in the last couple of weeks have been happening a lot. However, it is my understanding that shouldn't affect traffic on the LAN.
Any ideas/suggestions would be awesome, but if not, thanks for letting me rant!