Situation: The client enabled his DHCP serer on Windows 2012 R2. However, it shows 169.254.auto IP address as DHCP server name.
Troubleshooting: There two NICs on the server. One of them doesn’t have statics IP address and it uses auto IP address 169.254.x.x. When the DHCP was enabled, it takes 169.245.x.x as DHCP server name.
Resolution is disabling the second NIC.
That fixes the problem.
Situation: The user make a call from Mitel softphone from home computer through the VPN connection. The phone icon is red and then it ends the call in just a few seconds.
Troubleshooting: In most cases, if the Mitel connect is running on two computers, office computer and home computer, you may have this issue. In this case, you need to logoff the Mitel on office computer.
Situation: When the user make a phone call from Mitel Softphone, the phone icon is green, but it doesn’t make the call and stays green forever.
Troubleshooting: In many cases, logoff and re-login Mitel Connect fixes the problem.
Situation: The client has a Server 2008R2 domain controller. He plans to run Azure AD Connect to sync the AD. However, Azure AD Connect has a problem to sync. dcdiag /test:DNS also shows errors.
Troubleshooting: we run ipconfig /all and find this server is mutil-home computers with two NICs. In most cases, this may cause DNS issue. Removing one of NICs fixes the problem.
Just try to prompt a windows server 2016 to DC in an existing windows 2012 R2 DC environment. The AD service is running and domain controller lists the windows 2016 as dc. However, Task Details and Notifications shows “Post-deployment configuration. If you double click on it, I get this: “Error determining whether the target server is already a domain controller”. I have rebooted the server twice. Please any suggestions?
Troubleshooting:1. restart the server.
2. Or Waited for half hour. The error disappear.
Case 1: After installing the 20H2 update. my computer lost all sound.
Went to task manager–under System Devices a red X on Intel Smartsound SST OED. Normally in Task Manager under “Sound, Video and Game Controllers” there are five entries including Realtek HD Audio–all of them completely disappeared except the two Nvidia entries.
Called support–we tried reinstalling the latest sound drivers from HP (I have a 17″ Omen Laptop) and it said the drivers would not support this version of Windows.
Finally the support guy had me roll back the update. Back up and running now on version 2004.
Case 2: My Windows didn’t start with blue screen after installing Windows 10 version 20H2. I must re-install previous windows 10 version.
Case 3: Can’t install Windows 10 version 20H2.
Resolution: you may need to run SFC /SCANNOW and DISM.exe /Online /Cleanup-image /Scanhealth && DISM.exe /Online /Cleanup-image /Restorehealth
Case 4: I get this message “Unable to complete updates. Undoing changes” when installing Windows 10 version 20H2.
Resolution: ejecting external drives either external SATA or USB, caused by windows defender MsMpEng.exe.
Or For now, as a workaround, I had to add the external drives to the exclusion list to avoid the ejection block. In my case the external drive has the letter E:\, this can vary in different machines or if there is more than one external drive.
Case 5: You may receive, “Windows can’t verify the publisher of this driver software” when installing Windows 10 version 20H2. It causes by incorrect device driver.
Case 6: I can’t update my windows, and every time I go to windows update, it says that something went wrong and try to re-open settings.
Resolution: Download and install Windows Update Assistant. This step by step video may help:
Situation: When attempting to activate office 365, you may receive this message: Error Code 80090034.
Case 1: The client’s domain name is compnayname.mydomain,com and email address is username@mydomain.com. When he setup a new laptop, the laptop takes username@compnayname.mydomain.com as email address. To fix this problem, go to Settings>Account>Access work or school to delete username@compnayname.mydomain.com. Re-assign in using username@mydomain.com.
Case 2: Try this method:
Go to the registry editor (Win+R; regedit)
go to HKEY_CURRENT_USER -> Software -> Microsoft ->Office -> 16.0 ->Common -> Identity
Inside “Identity”, create a new REG_DWORD value called “EnableADAL” and leave the value at 0
Restart the PC and try again to login from Office 365. In my case, the logon screen was now different and it worked perfectly.
case 3: Repair the Office 365 under control Panel>Uninstall programs.
Case 4: Re-install Office 365.
Case 5: Solution was to set this registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Cryptography\Protect\Providers\df9d8cd0-1501-11d1-8c7a-00c04fc297eb\ProtectionPolicy = 1 (DWORD)
Case 1. The client’s domain name is companyname.mydoamin.com, he doesn’t know which is the domain name. If their have correct name resolution or DNS setup, either pre-windows 2000 name compnayname or GQDN companyname.mydoamin.com should work.
Case 2. In above case 1, only pre-windows 2000 name compnayname works, GQDN companyname.mydoamin.com doesn’t. The reason for this, it could be the mydoamin.com is the public domain name. If you ping mydoamin.com and get a public IP address. You may not be able to join the domain use the public domain name, like mydoamin.com. In this case, you may create A record in your DNS and point the mydoamin.com your local private IP address. Otherwise you must use pre-windows 2000 name like compnayname in out above example.
Case 3. in above case 1 and 2, pre-windows name doesn’t work also. one resolution is install WINS server on your DC.
Case 4: in above case 1 and 2, none of pre-windows name or FQDN works. In this case check the DNS settings. In one of our cases, the client use their router as DNS server. it is recommended to setup DNS on the DC and each client use the DC DNS as primary DNS server.
Case 5. in other case, the client setup a laptop using WiFi. However, the WiFi uses different IP range from wired. Using Wired connection fixes the problem.
Case 6. Use network ID instead of Change to join the domain.
7. Using hosts or/and lmhosts.
Situation: The use login this morning, all icons in the Desktop are missing and it is blue screen.
Troubleshooting: 1. Enable “Show desktop icons” by right-0clciking on the blue screen and go to View.
2. Enable the Desktop Icons Visibility
