Relay via Office 365 stopped working - Client host blocked using Spamhaus

Issue

Relaying email via Office 365 suddenly stopped working. Relayed emails were sent from a Windows 2012 Server using a simple PowerShell script. After logging in to the server and running the PowerShell script in an interactive mode following error was displayed:

Exception calling "Send" with "1" argument(s): "Mailbox unavailable. The server response was: 5.7.1 Service unavailable, Client host [212.159.94.214] blocked using Spamhaus. To request removal from this list see http://www.spamhaus.org/lookup.lasso
(AS16012612) [VE1EUR01FT026.eop-EUR01.prod.protection.outlook.com]"

Read more: Relay via Office 365 stopped working - Client host blocked using Spamhaus

Hyper-V VM move fails with 0x8009030D error (credentials not recognized)

Issue

Trying to move a virtual machine from one Hyper-V 2016 host to another while running Hyper-V Management Tools from a separate management server. Following error is displayed shortly after starting the move operation:

There was an error during move Operation.
Virtual machine migration Operation failed at migration source.
Failed to establish a connection with host "DESTINATION-SERVER": The credentials supplied to the package were not recognized (0x8009030D).
The Virtual Machine Management Service failed to authenticate the connection for a Virtual Machine migration at the source host: no suitable credentials available. Make sure the Operation is initiated on the source host of the migration, or the source host is configured to use Kerberos for the authentication of migration connections and Constrained Delegation is enabled for the host in Active Directory.

Read more: Hyper-V VM move fails with 0x8009030D error (credentials not recognized)



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