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Object reference error on creating a new queue or opening a queue for mailbox

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Dear Dynamics Community,

I am quite a beginner in Dynamics 365. I need some help in order to fix a strange issue I am getting when I created a mailbox for handling a rule of creating a lead when someone emails to a specific user in Dynamics 365 Sales. What I did was:

1. Created a user and added it in my trial organizaiton for Dynamics 365 Sales (Trial Online)

2. Created a mailbox (Queue was created by default)

3. Added a creation rule for lead when email (I did this via Automatic Record Creation and Update Rules)

4. I saw that I can successfully login into outlook.office.com with my user (As I already applied license for Office 365 E3 to the user)

At first, I was able to get email and the rules were working fine and were creating lead records in CRM as expected. But after some time it stopped. When I tried to open the queue for mailbox it gives me an error:

Exception type: System.ServiceModel.FaultException`1[Microsoft.Xrm.Sdk.OrganizationServiceFault]

System.NullReferenceException: Object reference not set to an instance of an object.

I am also attaching the complete log file in the post for further details.

Does someone know or experienced this error before so it could be really helpful for me. Thanks

ErrorDetails-_2800_12_2900_.txt

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Nya 29,060 on at

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Hi,

Here is an issue with the same error message which may help you:

(+) Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.NullReferenceException: Object reference not set to an instance of an object. - Microsoft Dynamics CRM Forum Community Forum

If this helped you, I'd appreciate it if you'd mark this as a Verified Answer, which may in turn help others as well.

Best Regards,

Nya

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Community Member on at

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Hi Nya,

Thanks for responding. I also thought the same and that is why I created another fresh organization (trial) and added Office 365 E5 license to the Admin user and tried to open up the Queue from Settings --> Service Management --> Queues.

But, unfortunately I faced the same error there too.

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