Two year old user account is showing up on meeting requests

An ex-administrative assistant is showing up on accepted meeting requests by the executive for which she used to be a delegate.

Her AD user account is long gone as is her mailbox.  How do I get rid of that association permanently?

We are using Exchange 2013 and Office 2013.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Amit KumarCommented:
1. Checked delegation of Executive and see if any unknown SID is there or go to Calendars then check permission on it remove if there is any unknown SID.

2. Any meeting which is accepted by assistant so you will have cancel that series and update it with new attendees.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
MatthewDKAuthor Commented:
Found some unknown SIDs in the Outlook permission entries for the executive's Inbox, Contacts, Tasks, and Notes.

Deleted them. Hope that does the trick.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.