O365 Exchange Hybrid Configuration and ShellId error.

If you get one of these errors:

Error:
Updating hybrid configuration failed with error ‘System.Management.Automation.Remoting.PSRemotingTransportException: Processing data from remote server failed with the following error message: [ClientAccessServer=xxxxxxxx,BackEndServer=xxxxxxx,RequestId=xxxxxx, TimeStamp=xxxxx] [FailureCategory=WSMan-InvalidShellID] The request for the Windows Remote Shell with ShellId xxxxxxxxxxxxxxxxxxx failed because the shell was not found on the server. Possible causes are: the specified ShellId is incorrect or the shell no longer exists on the server. Provide the correct ShellId or create a new shell and retry the operation. For more information, see the about_Remote_Troubleshooting Help topic.

when trying to run hybrid wizzard configuration:

https://aka.ms/HybridWizard

You might want to try turning off MFA for admin accounts – you give second factor code/consent whilst logging to the configurator, but obviously it later tries to run some commands in the background and these also enforces MFA.

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DMARK, DKIM and SPF – deep dive useful links (with focus on O365)

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Sometimes it is good enought to have a place where you got a reliable links where are all the information needed – as this blog purpose it to be my notepad also to let me remember thigs for a longer time, will place them here. Especially DKIM – it is broadly presented on the Internet, but I was not able to find a place where everything will be described from A to Z. So here is a portion of usefull links about mentioned mechanisms.

Continue reading “DMARK, DKIM and SPF – deep dive useful links (with focus on O365)”