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

Question

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

SC 236

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

KyleXu-MSFT 26,396 Reputation points

2022-05-13T02:23:15.407+00:00

@SC
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:
KyleXu-MSFT 26,396 Reputation points

2022-05-16T06:55:05+00:00

@SC

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

Accepted answer

0 additional answers

Your answer

KyleXu-MSFT 26,396 Reputation points

2022-05-13T02:23:15.407+00:00

@SC
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:
KyleXu-MSFT 26,396 Reputation points

2022-05-16T06:55:05+00:00

@SC

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

Answer 1

Rich Matheisen 47,901

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.

SC 236 Reputation points

2022-05-12T14:38:46.217+00:00

Here is the screenshot
Rich Matheisen 47,901 Reputation points

2022-05-12T15:13:30.663+00:00

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.
SC 236 Reputation points

2022-05-12T15:36:13+00:00

How can I get DomainID ?
Rich Matheisen 47,901 Reputation points

2022-05-12T18:46:00.1+00:00

I don't know what you're referring to when you say you want the "DomainId". Are you looking for the name of the domain?

Are you running your script in an on-premises AD Forest? Is there a reason you're using the MS Exchange cmdlet Get-DomainController instead of the Active Directory Get-ADDomainController cmdlet?
SC 236 Reputation points

2022-05-24T09:06:52.427+00:00

Sorry, you are right.
Yes, I'm looking for the domain name.
Problem solved, I used (Get-ADDomainController).Domain

Thank you very much.

Share via

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

0 additional answers

Your answer