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Thanks to:  https://blog.dargel.at/ The need to remove an Exchange 2013 server using ADSIEdit could have several reasons. The method using ADSIEdit to remove an Exchange server should only be used carefully. The most common reasons are listed below: The deinstallation didn’t finish properly and left attributes or entries in Active Directory The Exchange server is permanent offline and Exchange should be removed An Exchange installation didn’t finish properly and the attributes and entries should be removed To remove the server open ADSI-Edit and go to configuration Navigate to this path: CN=Configuration,DC=DOMAIN,DC=LOCAL CN=Services ->; DELETE CN=Microsoft Exchange CN=Microsoft Exchange Autodiscover CN=Default naming context,DC=DOMAIN,DC=LOCAL ->; DELETE CN=Microsoft Exchange Security Groups CN=Microsoft Exchange Security Objects Additional steps: Hard Disk: On the server’s hard disk you’ve to DELETE the Exchange Server...

Thanks to:  http://www.thatlazyadmin.com/ The default location for the Exchange Queue Database is in the Exchange install directory under TransportRoles. The location of the queue database and the queue database transaction logs is controlled by keys in the %ExchangeInstallPath%Bin\EdgeTransport.exe.config XML application configuration file. This file is associated with the Exchange Transport service. How do you change the location of the queue database and queue database transaction logs? To modify the default location, the EdgeTransport.exe.config xml file needs to be modified. Launch command prompt as administrator and run the following to open the edgetransport config file. 1 Notepad % ExchangeInstallPath % Bin \ EdgeTransport . exe . config Scroll down till you get to  “<appSettings>”  and modify the following keys. 1 2 3 < add key = "QueueDatabasePath" value = "<LocalPath>" / > ...

Thank to:  http://www.mustbegeek.com/ Log on to  Exchange 2016  and open  Exchange Management Shell (EMS) . Type following cmdlet to convert a user mailbox to shared mailbox. [PS] C:\Windows\system32>Set-Mailbox AJones -Type shared To view the shared mailbox, log on to EAC. Go to recipients > shared. Now, open the properties of the shared mailbox by double-clicking it and assign permission to users. After assigning permission click save. In this way you can convert a user mailbox to shared mailbox. Now, if you open  Active Directory Users and Computers  snap-in, you will see the user  AJones  is now disabled. That’s because shared mailbox have disabled user account and you can’t login to it directly. You can also convert shared mailbox back to user mailbox. Type following cmdlet in EMS. [PS] C:\Windows\system32>Set-Mailbox AJones -Type regular You may have to reset user password before you enter above cmdlet if you ar...