Exchange user still able to send email from phone after device removal from Server

We have Exchange 2010 running on Server 2k8 R2 Enterprise edition.  When an employee leaves or is terminated we don't disconnect the mailbox.  Instead we remove all mobile device partnerships and hide them from Exchange Address Lists (as well as disabling them in AD and putting them in a disabled user OU).  But last week we let a user go and I disabled her account, removed her mobile device partnerships and hid her from Exchange Address Lists at 10:30am on Tuesday.  The next day at 11:35am she replied to an email stating that she had been replaced.  I double checked that she was disabled in AD, and her mobile device partnership had been terminated.  She had also been removed from the exchange address lists.  

 My question is how long does it take before a smart phone will lose it's connection with Exchange Active Sync after I remove the partnership?  Basically, how the heck did she reply lol.  Any answer is much appreciated.  Thanks.
Who is Participating?
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.

Mahesh SharmaCommented:
If you remove device partnership, it wouldn't stop mobile phone from sync.
With next sync, mobile device will create a new partnership.
Instead Disable Active Sync for terminated user or Disable AD account or Reset Password.

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
cmhtechAuthor Commented:
Mks_  "as well as disabling them in AD and putting them in a disabled user OU"
           " I double checked that she was disabled in AD"  I do disable them in AD, but I do like the reset password idea as well.  I will incorporate that in the future.  Thanks.

Talkinsmak - That is exactly what I was looking for.  Thank you!
Any time.  Glad it helped.

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.