Unable to Remove Shared Mailbox in Outlook

Question

I have a shared mailbox (On prem) mapped to my account (migrated to O365). I've removed access my access to the shared mailbox, but still the mailbox shows up in outlook

Steps tried>

1. removed access via EMC (been close to 48 hrs now still the mailbox shows up)
2. removed access via Powershell (Remove-MailboxPermission -Identity "Mailbox Name" -User "Account" -AccessRights Fullaccess) - No Go

3, after removing access created a new profile and checked still the same .

Please advice

Answer 1

Check with PS on-prem where the shared mailbox lives:

Get-ADUser <User> -Properties msExchDelegateListLink

If that value is populated, clear it via set-aduser or via adsedit.msc or via aduc with advanced features checked to enable the Attribute Editor:
Prob quickest just to browse to the account via adisedit or ADUC and remove your mailbox in that attribute if it exists there.

Answer 2

Hi Andy, Thank you so much.

It worked :)