Exchange POP3 service drop connections

Few days ago, I received call from client which had a problem with fetching emails to his gmail account from Exchange 2013. Gmail for that purpose using POP3 protocol, and my troubleshooting started. I created POP3 account in Outlook, Thunderbird, mobile devices, and every time my account is synchronized successfully. But the client still had…

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How to completely disable IPv6

Starting from Vista / Server 2008, Microsoft includes native support for IPv6 and is enabled by default. But sometimes you don’t need IPv6, and want to completely disable IPv6. The proper way to disable IPv6 is to disable via the registry. In registry editor (regedit), navigate to HKLM\System\CurrentControlSet\Services\TCPIP6\Parameters. Create new DWORD (32-bit) value with name DisabledComponents and add…

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Multiple Concurrent RDP Sessions in Windows

In Windows client operating systems, only one simultaneous incoming RDP connection is supported. That’s means that only one user can simultaneously connect to a Windows computer using RDP. When you trying to start the second RDP session, a message “Another user is signed in. If you continue they’ll be disconnected. Do you want to sign…

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How to add Exchange Snapin to Powershell?

When you install Microsoft Exchange, you can manage Exchange infrastructure on two way. Exchange Management Console or Exchange Control Panel from in Exchange 2013 or later. Exchange Management Shell or Powershell. Almost all standard tasks you can do with GUI tools, EMC or ECP, but for many other tasks need to use EMS or Powershell. That…

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List all Exchange mailboxes sorted by size

During last few months, more than few times I received inquiry from clients, where they want list all mailboxes sorted by size. For that action, approximately needed time is 5 minutes, if you know which PowerShell command you need to run. Command Get-Mailbox | Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | Select DisplayName, TotalItemSize will show you…

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Removing default Exchange databases

Every time when you install new Exchange servers, one default mailbox will be created. Of course, each default database has a impractical name, such as Mailbox Database 0123456789. The most Exchange administrators don’t like default names, and like to create their own names. In some moment, you will probably want to remove default database, because “it…

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How to check installed SQL components

Have you ever had the need to install an identical SQL server what you currently have? Of course, you need information about the installed components, but you’ve wondered how to easily do so. You can do that on two ways, and each of them are pretty simple.   Solution 1: Open start menu / screen on…

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Windows Server 2016 Nested Virtualization

In one of previous posts, I show you how to configure nested virtualization on VMware ESXi. Now, I will show you same feature on Windows Server 2016. With TP4 of Windows Server 2016, Microsoft introduced Nested Virtualization in Windows Server Hyper-V. As I said earlier, nested virtualization allows you to run a hypervisor inside a…

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Event ID 4113: Unexpected Error . . .

As Exchange administrator, did you ever seen event error log Event ID 4113: Unexpected Error When calling the Microsoft Exchange Active Directory Topology service on server? Event is repeated every 15 minutes, but everything works without problems. You must agree, the problem is totally weird and creating unnecessary anxiety. Especially when you find how to fix the problem….

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How to upgrade Windows 2012 R2 evaluation to full version?

Although is Windows Server 2012 R2 “old” OS, before few weeks I had to license evaluation version of Windows Server 2012 R2. Process is very simple, but change the license key requires use of CLI instead GUI. By Microsoft, that is not “just” licensing, that is upgrade to Windows Server 2012 R2. At the first…

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