Shared mailbox still accessible for user

[Dirk Messiaen]

Hello

I have converted a user mailbox to a shared mailbox because the user left the company and we wanted to archive the mail. No user has right to access the mailbox.

Now we noticed that the initial user still has access to the mailbox. He can still login true OWA and send mails.

I thought that converting a mailbox to shared disabled the access for the user. 

Am I wrong?

Dirk

[#2]

Hi Dirk,

Does the user still have license ?

[#3]

Hi Nuno

No the user does not have a licence.

[#4]

Hi Dirk,

Please read the following link and go to the section "Block a former employee's access to Office 365 data" https://support.office.com/en-us/article/remove-a-former-employee-from-office-365-44d96212-4d90-4027...

[#5]

easiest solution is to change the users password :p. Or you can set the flag in 365 under users and change the Sign-in allowed to Blocked. 

Hard solution is setup retention policies so you don't have to worry about it :).

Shared mailboxes do get disabled on-prem, but not in 365 since other services are connected to the account usually.