Exchange 550 5.7.1 RESOLVER.RST.AuthRequired; authentication required

We have faced the following error when were trying to send an email outside organization to the (from the Gmail) to a distribution group (list) or a public folder (mail enabled public folder) in a domain with the Exchange (the same problem may occur in Office 365 tenant). The

How to Secure Local Administrators in Windows?

The Windows operating system has a built-in administrator account. This account v. To prevent this, the built-in administrator account must be secured. Disable and Rename Local Administrator Account To protect the administrator account from brute-force attacks, you can disable the built-in administrator account, and if you cannot do this,

Capture and Deploy Image Without Sysprep

In some cases, the administrator needs to capture the Windows image installed on the reference computer without using Sysprep. In our case, this turned out to be necessary due to the fact that the rather old legacy program is installed on the computer, which is installed and linked to

Renaming your Archive File in Microsoft Outlook

If you use the archive (PST) files in your Outlook configuration, they are displayed in the Outlook folder tree on the left side. By default, Outlook archive folders are named like this: “My Outlook Data File”. As you can see, in my Outlook configuration there are 2 archive folders

Installing the ConfigMgr Console for SCCM

Once you have Microsoft System Center Configuration Manager (SCCM) 2012/2007 installed, you most likely will want to manage it and perform all the admin tasks remotely on your computer, not from the server itself. This requires you installing the ConfigMgr console on your desktop workstation running on Windows 10

Error 0x80070057: How to Solve?

You may encounter an error 0x80070057 in both Windows 7 and modern Windows 10. This post will explain what that the issue is, where it comes from, and, most importantly, how to fix it. What Causes Error 0x80070057? Error 0x80070057 can manifest itself in various Windows components: Most of

The Processing of Group Policy Failed

There are a number of reasons why The processing of Group Policy failed error could happen. When you try to run gpupdate /force you receive the following error: User policy could not be updated successfully. The following errors were encountered. The processing of Group Policy failed. Windows attempted to

Managing Mailbox Size and Quota on Exchange Server 2016

One of the important tasks of an Exchange administrator is controlling mailbox sizes. It is very difficult to force users to voluntarily limit the size of their mailbox, so you have to use mail server quotas. Typically, mailbox quotas in Exchange Server are defined at the database level and

Manage and Disable Windows Defender Using PowerShell

Windows Defender first appeared as an anti-virus utility for Windows XP. Since Vista it was built into all Microsoft OS as a protection against viruses, worms, trojans and other type of malicious software. In Windows 8 it was merged with another antivirus product—Microsoft Security Essentials, and now it is

Moving Exchange Mailboxes to Another Database

Exchange administrator can move user mailboxes in the Active Directory forest from one database to another between Exchange servers, or between mailbox databases on the same server through the Exchange Admin Center web interface or PowerShell CLI. Consider how to migrate mailboxes between databases using Exchange Management PowerShell in