Mailbox Delegation keeps being added

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New Contributor

Looking for some help. We're working with a hybrid 2013 & O365 Exchange environment. I keep having Mailbox delegation being added to user accounts that we are not manually adding. I keep removing the delegation but it keeps coming back hours later. 

 

Wondering if this is a know issue, or if there's someone that might have seen this before.

 

Thanks

2 Replies
Check the admin audit log.
Try checking automapping via powershell, get-aduser "username" -properties msExchDelegateListLink | Select msExchDelegateListLink