Exchange 2013 mailbox delegation error message (NT Authority/self corrupt object)

Having some issues i cant wrap my head around.

See attached picture for error message.

Researching.
Adding users to mailbox delegation will not give them the actual access. Need to use add-mailboxfolderpermission and add-adpermission. It's not given this actually works. For now it works in 50% of the cases.

The 9b026da6-0d3c-465c-8bee-5199d7165cba is :

IdentityReference     : NT AUTHORITY\SELF
ActiveDirectoryRights : Self
InheritedObjectType   : bf967a86-0de6-11d0-a285-00aa003049e2
InheritanceFlags      : ContainerInherit
InheritanceType       : Descendents
ObjectFlags           : ObjectAceTypePresent, InheritedObjectAceTypePresent
ObjectType            : 9b026da6-0d3c-465c-8bee-5199d7165cba
PropagationFlags      : InheritOnly
AccessControlType     : Allow

It seems like this is the object that actually failes.

I also noted on the user in AD, there is propogated some objects that is deleted. This is not the SELF object but likely some level of user access.


So to my questions :

How can i repair/verify the NT Authority\SELF object ?
What is needed for an AD account to be given correct access to the mailbox (in Security objects) ?
Anyone have any tips and/or tricks ?
Mailbox-delegation1.png
LVL 1
Mr WooberAsked:
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Peter HutchisonConnect With a Mentor Senior Network Systems SpecialistCommented:
NT Authority\Self is not an account as such but allows the owner of the mailbox have full access to the mailbox. An alternative is just to add the domain\username account to the permissions which does the same thing, but this is has to be done manually.
You can view and verify permissions to mailboxes using Get-MailboxPermission -Id mailboxname to list all permissions or Get-MailboxPermission -Id mailboxname -User "nt authority\self" to confirm Self rights.
Also you can check user permissions on the mailbox database:
Get-MailboxDatabase DBName | Get-ADPermission -User "everyone" | fl Inher*,Extend*
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Mr WooberAuthor Commented:
Thanks for the swift reply.

Not quite sure what to get out of the Get-MailboxDatabase DBName | Get-ADPermission -User "everyone" | fl Inher*,Extend* (sett picture attached)

Attached picture 3 with the mailboxpermissions. What i noticed that our admin user (marked/filled with red) is noted 2 places with what seems the same access level.
Mailbox-delegation2.png
Mailbox-delegation3.png
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Peter HutchisonSenior Network Systems SpecialistCommented:
The permissions for Database look to be the same as ours.
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Mr WooberAuthor Commented:
The solution was to do an Windows Update then restart. Solved the issue with the delegation access
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