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Exchange Mailbox TA Script errors

mburgess97
Path Finder
Exchange TA

I have the scripted input for the Admin Audit Log. 
 
In a nutshell the script runs the command below with additional scripting to dump to a file, etc..
Search-AdminAuditLog -StartDate $LastSeen -EndDate (Get-Date)
 
I am receiving the following error:
WARNING: An unexpected error has occurred and a Watson dump is being generated: Object reference not set to an instance of an object.

I have create a new domain account with appropriate roles in exchange.  I can also run this command successfully from the new user.

Any ideas on how to troubleshoot this?  I'm at a loss. There is nothing in the event viewer that helps.

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