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Exchange Online error: Write-ErrorMessage : Object reference not set to an instance of an object.
I am unable to Modify ab Authentication Policy : Set-AuthenticationPolicy -Identity "Block Basic Auth" -AllowBasicAuthImap:$false I get the below error: Write-ErrorMessage : Object reference...
For me the solution was creation of new policy with all the desired parameters in one command. It is strange, but it is working 🙂
Try to run the following command.:
New-AuthenticationPolicy -Identity "Block Basic Auth_v2" -AllowBasicAuthPop:$false -AllowBasicAuthSmtp:$false
Do not forget to put all the parameters to command. Edit of policy via Set-AuthenticationPolicy is (currently) not working. You cannot edit it later.
I have the same error message when trying to run this command. I tried also Cloud Shell/ PowerShell from Azure portal and here I got the same error: "Set-AuthenticationPolicy: Object reference not set to an instance of an object."