How can an exchange account that is disbaled, send out a meeting request?

We have a user that was let go from the company so we disabled their AD and Exchange (exch 2013) account but for some reason today, they disabled account sent out a meeting request...
How could this be and how can we stop this from happening?
LVL 1
vmichAsked:
Who is Participating?

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

x
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.

Murali ReddyExchange ExpertCommented:
Mailbox disabled (disconnected) or just AD account disabled?

If just AD account is disabled I see two possibilities-

1- There shall be a delegate with SendAs or sendon behalf rights sending this invite intentionally or unintentionally.

2- An old meeting request where the organizer is the so called disabled user, is updated by respective user delegates.

or there is a also a possibility that a synced device (ActiveSync) involved here.
vmichAuthor Commented:
The AD account was disabled which in turn should disable the exchange account correct?
Murali ReddyExchange ExpertCommented:
That is a wrong perception. Disabled AD account will deny the user to interactively logging in to the mailbox. However the mailbox is still functional and can receive emails. Delegates can work on behalf of the mailbox (and hence the email address).
Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

vmichAuthor Commented:
Well I just checked the account in exchange and it appears that it is saying it is disabled..
How can I be sure it is disabled in exchange which I think it is?
Murali ReddyExchange ExpertCommented:
simple - You send a test mail, it will not shoot any NDR. Check your tracking log, the message is delivered to the mailbox.
Will SzymkowskiSenior Solution ArchitectCommented:
If the mailbox is DISABLED, then it will not appear in the EAC or Powershell. This mailbox will be in a Disconnected State if the mailbox is disabled. If it is only the AD Account that is disabled then mailbox is still active as Murali has already mentioned.

If you had calendar items that were stuck in the Outbox or delayed sending this could also be another reason why it was sent out.

Will.
vmichAuthor Commented:
I found the issue.. We were not given all of the information first by the users... Go figure!!!
The reason this was happening is that users were forwarding these meeting request they had on behalf of the users who was no longer with the company...

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
vmichAuthor Commented:
forwarding users meeting request
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
Exchange

From novice to tech pro — start learning today.