You cannot call a method on a null-valued expression in Exchange Management Shell 2019

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SC-2222 asked May 12, '22 SC-2222 commented May 24, '22

You cannot call a method on a null-valued expression in Exchange Management Shell 2019

I am not able to execute the following command in Exchange Management Shell 2019. It returns the error as "you cannot call a method on a null-valued expression"

[PS] C:\>$domain = (Get-DomainController).Identity.DomainId.ToString()
You cannot call a method on a null-valued expression.
At line:1 char:1
+ $domain = (Get-DomainController).Identity.DomainId.ToString()
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull

windows-server-powershell office-exchange-server-administration

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KyleXu-MSFT · May 13 at 02:23 AM

@SC-2222
Could you tell us where do you see “DomainId” and why you need to get it?

There doesn't exist "DomainId" in Identity, so you will get such error:

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qa-kyle-10-22-21.png (30.4 KiB)

KyleXu-MSFT KyleXu-MSFT · May 16 at 06:55 AM

@SC-2222

Any update about this thread now? If this issue still exist, could you provide more detailed information to us for narrowing down this one?

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Answer 1 · 2022-05-12T14:33:50.257Z

RichMatheisen-8856 answered May 12, '22 SC-2222 commented May 24, '22

What results do you get if you simply run Get-DomainController?

The error is telling you that the cmdlet returned a value of $null instead of the domain controller object(s) you expected.

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SC-2222 · May 12 at 02:38 PM

Here is the screenshot

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result.png (78.7 KiB)

RichMatheisen-8856 SC-2222 · May 12 at 03:13 PM

I see an "Identity" property in the output, but it appears to be a string value. If that's the case it (the Identity property) won't have "DomainID" property. And if all that's true, then the "ToString()" method will fail.

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SC-2222 RichMatheisen-8856 · May 12 at 03:36 PM

How can I get DomainID ?

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