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Remove the delegate (Deleted ad account)from Outlook to fix the issue.
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Remove the delegate (Deleted ad account)from Outlook to fix the issue.

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I am getting message &quot;Delivery has failed to these recipients or distribution lists&quot;: I have removed the SID from everyone's delegates and also from permissions. &nbsp;This still comes up when sending meeting requests. &nbsp;Can you please let me know if you have seen this before and if so what can be done to eliminate. 
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I am getting message "Delivery has failed to these recipients or distribution lists": I have removed the SID from everyone's delegates and also from permissions.  This still comes up when sending meeting requests.  Can you please let me know if you have seen this before and if so what can be done to eliminate. 

MS Outlook/Exchange

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.