Troubleshooting is a problem-solving process of evaluating faults that occur in a mechanical or electronic system. Steps often include recreating the problem and then trying alternative and creative solutions in order to fix the situation. Troubleshooting is deployed when software or hardware are rendering abnormal responses or remain unresponsive.

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Hi guys

I'm working on putting together a technical test to help a colleague in another country in their recruiting process. The candidate claims to have had 9+ years working in Microsoft environment based system administration, maintenance, troubleshooting and support of data centers. This in itself is rather vague. They do claim to have had Level 1, 2 and 3 support in a Windows server environment during the 7years of their tenure.

I've got around 15-20 questions set up already. I was going to ask if it was possible for some of you to throw some technical questions around Active Directory, DNS, DHCP and SAN's. I know this isn't specific to any particular topic which makes it harder. But if you can think of any questions that I could perhaps ask them, then I'll review it. Any help would be great.

Thanks for helping
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Hello Experts,

One of my customers is running into an issue where they are unable to mount a mailbox in Exchange 2016 that was disabled by mistake and then reconnected to another user in AD.


Mary Doe's mailbox was disabled for some reason, and the help desk team, instead of reconnecting the disabled mailbox, they provisioned a new mailbox for this user. Once the user check the emails, obviously all email is gone because is displaying only items from this new mailbox.

Company has a test account named John Doe with a mailbox. The mailbox for John's account was disabled, and then following cmdlet was performed to reconnect Mary's original disabled mailbox to John's mailbox

Connect-Mailbox -Identity "Mary Doe" -Database DB100 -User "John Doe"

And the following error was displayed:

The LegacyDN xxxxx is in use by the following user in Active directory: Mary Doe. The value for LegacyD must be unique to each user.

In order to resolve the issue above, they added an extra blank space to LegacyDN attribute in AD for Mary Doe using ADSI edit tool, then ran cmdlet below, and Mary's disabled mailbox was successfully reconnected to John's account

Connect-Mailbox -Identity "Mary Doe" -Database DB100 -User "John Doe" -AllowLegacyDNMismatch

So, we also granted full mailbox permission access to Mary's and John accounts to perform troubleshooting, however we are unable to mount or open Mary's mailbox from John's account using outlook and OWA. Getting …
I created a test exchange server 2016 (internal only) but Autodiscover is not working.
I tried troubleshooting but was unsuccessful.
please advice.
My client has an HP ProLiant DL160 Gen9 that has started rebooting randomly over the last two weeks, below is the latest bluescreenview which points to ntoskrnl.exe as the culprit however i have no idea where to start troubleshooting.

All applicable windows server updates installed and i also ran a system file check which did resolve some issues however the reboots still occur.

Any thoughts??

SBS2011 getting ready to replace the server, in the meantime DNS resolution is horrible however I'm not convinced it's the server I think it's on the ISP side. When I ping either DNS server from the ISP it has a lag well above 25ms to 35ms. This is not enough though to determine why DNS resolution is so slow and the reason for this post. How to proceed troubleshooting in this case.

SBS2011 doesn't use forwarders but I tried them anyway without any luck. I also added for testing purposes and nothing changed. SBS2011 DNS/DHCP is configure, without forwarders and is using root hints. Firewall is using DNS from the ISP.

Something strange, when I make a VPN connection my resolution is fine. I may not be fully understanding DNS through a VPN connection, my understanding is I'm routed through the server so shouldn't I see the same issues? Note, I'm not using SBS routing and remote access using L2TP on the firewall. Maybe I just answers my question and I'm routing around the SBS2011 Server.

Also upgrade the bandwidth which is nice, much faster but the DNS resolution is still extremely slow and an issue.
I have an NEC DT700 series phone. I think specifically it is a DT730.

Right now the message light is blinking, but the voice mailbox is empty.  It also has "MSG >>>" on the screen.

There is "Frontdesk" as the identifier, but I cannot clear that off.

I want to create a trigger on a table on INSERT. So when an INSERT attempts to happen on the table, a SELECT is first run and if the SELECT returns rows, the INSERT is cancelled but the transaction ls logged to another table.

The code that has the SELECT in, is as follows


Open in new window

The above works as expected.

I'm now trying to develop a trigger on the table in question:

/****** Object:  Trigger [dbo].[TRIG_WIDGET_ADDITIONAL_COUPON_ISSUE]    Script Date: 08/16/2018 09:41:50 ******/

	DECLARE @inserted TABLE ([couponID] [bigint] NOT NULL,[organizationID] [bigint] NOT NULL, [orgLevelID] [bigint] NULL, [couponTypeID] [bigint] NULL, [accountID] [bigint] NULL,	[promotionID] [bigint] NULL,[customerID] [bigint] NULL,[hashCode] [int] NULL,[couponCode] [nvarchar](32) NULL DEFAULT ((0)),[serialNumber] [nvarchar](50) NOT NULL,[createdLocalDateTime] [datetime] NOT NULL,[createdHostDateTime] [datetime] NOT NULL,[createdLocationID] [int] NULL,[issuedLocalDateTime] [datetime] 

Open in new window

Plan to purchase a network troubleshooting tool. This tool is one of the more popular brands on the market. It is the inline version. Our company is  using a Cisco switch network environment. Our switches are configured for port security using “Sticky Macs” with a maximum of 2 addresses allowed. One for computers and the second for IP phones.

My question is are these inline testers useful or useless in a Cisco port security network. I have been told that these type testers have MAC addresses that will “trip” port security  and render the tester virtually useless. My main purpose for inquiring about this tester is when I attempt to trace cables runs to identify and display what interface the cable is connected to on the switch.

Also, another issue is, that because some of these switch are configured with port security and ACL list, the port under investigation may be  “ shut down or inactive”. Will this popular network tester indentify and locate interfaces on the switch that are INACTIVE?
The cable run from the patch panel to the switches in out closets are a complete mess!
It looks like a giant plate of spaghetti!!! I am quite sure you know what I am talking about!
As a result it is very difficult to trace the Ethernet patch cable “all the way” to the end point on the switch panel. Most times I have to take an educated guess when trying “see” where exactly the cable goes into the interface.

And finally, is there a network tool on the market that will,do what I …
I need help troubleshooting a firestore query into array.
Hello. I am troubleshooting a WYSE Thin Client with Win Embedded Standard 7.  Earlier yesterday, I got the error" Failed to Connect to MQTT Server! twice. I'm stumped at the moment as to why that is happening. It isn't affecting the home user to where she can't log into RDP, etc, I simply want to know how I can rectify this error from coming up in my Events tab on the Wyse Management Suite. Thanks!
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Hello. I am troubleshooting a WYSE Thin Client with Win Embedded Standard 7.  Earlier yesterday, I got the error" Failed to Connect to MQTT Server! twice. I'm stumped at the moment as to why that is happening. It isn't affecting the home user to where she can't log into RDP, etc, I simply want to know how I can rectify this error from coming up in my Events tab on the Wyse Management Suite. Thanks!

When i move this user mailbox from db1 to db4 which encountered this error:

Property expression ‘user1’ isn’t valid values are: Strings that includes @, cannot be the last character


1. Checked user at AD and confirmed no space and invalid character
2. Checked ADSI Edit > OU=OP > OU=Mail > CN=user1 no invlid character
3. Checked user can login to the outlook and OWA without any issue like file corruption

How to troubleshooting and can move user mailbox without this issue.

If need to run powershell, can i understand where to run it and what will be the easy command for me that never used powershell. Run In exchange 2010 or PC with Powershell login with import-module.  


Encountered this outlook connecting message (hang for while) when opening this email user with signature logo of website link. see attachment.

Performed the following troubleshooting.

1. Uncheck all security trusted settings in outlook
2. add in * with 2 or 3 value to allow internet site
Power outage created a mess with Exchange and auto discovery issues since. After power outage cycled on a 2012 Sever Standard with two VM's, 1. PDC 2. Exchange. After server came up Exchange doesn't allow auto-discover and Outlook clients don't connect. First problem was noticed when all Outlook clients reported "Trying to connect" to the Exchange server. For troubleshooting purposes I deleted an Outlook profile and get the following trying to create a new profile.
errorerror2Some certs were replaced and we believe the problem may be here, we're looking at certs and will follow up. Another interesting issue is the IP address on the exchange server was hardcoded before the server restart. However after the power outage when the server restarts in DNS and the "Network" tab on the VM show a different IP address, it's dynamic rather than the static. Tried to get things working with the static IP however Exchange will not work at all this way. Changed the static IP address on the Exchange server to DHCP and it works with OWA only. Outlook clients still won't connect. With auto-discovery not working all phones have disconnected, this likely will change after auto-discover is working again.
Currently Troubleshooting an issue on our file server with a large share where I as an admin via any commputer am unable to copy or save changes to the share.

Will having the read only check box affect users from copying or making changes to files\folder  in the sub folders on a network share? Event though Ntfs permissions and share permissions have been set accordingly.

Hello Experts

I am searching for emails in Outlook 2010 from Access 2010 VBA and want to use the AdvancedSearch method.
I know that the email I am searching for exists because I can see it in the Deleted Items folder. However, after at least 30 minutes of searching, AdvancedSearch hasn’t yet found it. The AdvancedSearchComplete event hasn’t yet fired (or if it has I haven’t detected it) and the search result set is empty. After this time, I find it hard to believe that sheer slowness is the problem.
Some more details:

1.      All the action is occurring in the Access class module for my email management form. In the form’s module header, I declare a WithEvents reference to my desktop Outlook instance, which I check is up and running, along with some related stuff:
Private WithEvents molApp As Outlook.Application      ‘ in class module header
Private mblnIsSearchComplete As Boolean   ' set True when email search completes

Private molNS As Outlook.NameSpace
Private molFldrBase As Outlook.Folder
Private WithEvents molFldrInbox As Outlook.Folder
Private WithEvents molFldrDeleted As Outlook.Folder
Private WithEvents molInboxItems As Outlook.Items

2.      In the Form_Open event handler, I set up the necessary references, first to Outlook, which I check is up and running, and then to key email folders:
  Set molApp = GetObject(, "Outlook.Application")  ' will raise error if not already running
   mblnIsSearchComplete = False

   Set molNS = …
I am trying to provide access to a camera on a remote network for a user by configuring VLAN on various L3 HP switches. The network I am working in has numerous VLANs and the path from the device to the camera crosses at least 4 L3 switches. I have been unable to get the connection to work and at this point need troubleshooting tips and a better understanding of how this should work.

At this point I would like to focus on a suggested methodology to troubleshoot connectivity on a VLAN. I have been told ping will not work because this is a L2 VLAN not intended to be routed from everything and that is why ping will not work, I think this is nonsense but please let me know if there is a way to track the VLAN path to see where the disconnect might be. Also, there has to be a L3 component as the source and destination networks are different and the route to the destination is specified on an L3 route table.

The following is the basic configuration:

Device :
Attaches to Switch 1 in VLAN 13 using an untagged (access) port. The PVID (native) VLAN on the configured port is 13.
There is no VLAN 13 interface configured on Switch 1. Using NDP and routing tables, I know that Switch 1 connects to Switch 2 using Tagged (Trunk) ports that include VLAN 13.
Switch 2 does not have an interface configured for VLAN 13.
I am unable to ping the camera from Switch 1 or Switch 2. There are no ARP entries for VLAN 13 in Switch 1. There are VLAN 13 entries in the ARP table on Switch …
new to certificate troubleshooting but getting this error on my AD server

also does this mean this AD server is also a certificate server?

its a Win 2008 R2 Std
I had this question after viewing STOP: c0000218 (Registry File Failure) - Windows 2000 Server.

Hello everyone...after consulting with a few other forums on this topic, with limited success, I am hoping to find a definitive solution here on the Experts Exchange.

Having posted a number of topics on this issue elsewhere, I'll keep it brief: I have an HP Vectra desktop computer that runs Windows 2000 Professional, but the device was stricken with the c0000218 "Blue Screen Of Death" back in 2010. With the help of some online computer-repair forum users elsewhere, I've managed to make some progress in trying to troubleshoot the error In the past year-plus, but have unfortunately hit a bit of a standstill in the process, and no other forum users have been able to help me move forward. Which finally brings me here to the Experts Exchange page. To save some trouble, I will provide links to the other forum topics I've started, some of which have screen captures to illustrate my progress, at the bottom of this post.

Fortunately, much of the hard work has already been done by myself with the help of the other forums' users, so hopefully, that one helpful tip to get through my logjam can come from any one of you here on this site.

Thanks in advance for any helpful replies :-)

Microsoft Answers
Bleeping Computer [1] [2]
CNET Forums
Backstory:  I did not configure this.  This configuration was already in place for the most part.  The only thing I changed was the priority queue percentages.  The markings were already in place.

The issue here is that when I do packet captures in Wireshark,  I don't see any of the marking

This is the QoS configuration on a 2811 Cisco router:

class-map match-any SDM-Transactional-1
 match dscp af21
 match dscp af22
 match dscp af23
class-map match-any SDM-Signaling-1
 match dscp cs3
 match dscp af31
 match dscp cs2
class-map match-any SDM-Routing-1
 match dscp cs6
class-map match-any SDM-Voice-1
 match dscp ef
 match dscp af43
 match access-group 180
policy-map SDM-QoS-Policy-1
 class SDM-Voice-1
  priority percent 60
 class SDM-Signaling-1
  bandwidth percent 15
 class SDM-Routing-1
  bandwidth percent 15
 class SDM-Transactional-1
  bandwidth percent 5
 class class-default
policy-map SDM-QoS-Policy-3
 class class-default
  shape average 9000000
   service-policy SDM-QoS-Policy-1
policy-map SDM-QoS-Policy-2
 class class-default
  shape average 2944000
   service-policy SDM-QoS-Policy-1

interface Multilink1
 description CenturyLink MPLS -
 ip address x.x.x.x x.x.x.x
 ppp multilink
 ppp multilink interleave
 ppp multilink group 1
 service-policy output SDM-QoS-Policy-2

interface GigabitEthernet0/1
 description Spectrum/Brighthouse Cable
 bandwidth 3072
 ip address x.x.x.x x.x.x.x
 ip …


Troubleshooting is a problem-solving process of evaluating faults that occur in a mechanical or electronic system. Steps often include recreating the problem and then trying alternative and creative solutions in order to fix the situation. Troubleshooting is deployed when software or hardware are rendering abnormal responses or remain unresponsive.