Automapping issue

Question

Hi All

I am using exchange 2016 hybrid environment. we create users in onprem and migrate to online. We create remote room mailboxes from onprem. One of my user is having access to Room mailboxes, i have removed the access to the room mailboxes but still user is able to see room mailboxes in outlook. i have checked onprem AD Attribute msExchDelegateListLink on room mailboxes and i dont see any user in it. i have used the below syntax to clear automapping but same issue. please guide me.

Remove-MailboxPermission -Identity "user1@contoso.com" -ClearAutoMapping

Answer 1

Hi @Glenn Maxwell ,

To disable automapping on a mailbox, use Exchange Online PowerShell to remove the user's full access permissions from the mailbox, and then add the user's full access permissions back to the mailbox, but with automapping disabled.

To remove the user's full access permission from the mailbox, run the following command:

Remove-MailboxPermission -Identity <MailboxIdentity> -User <UserIdentity> -AccessRights FullAccess

To grant full access permissions back to the user on the mailbox with automapping disabled, run the following command:

Add-MailboxPermission -Identity <MailboxIdentity> -User <UserIdentity> -AccessRights FullAccess -AutoMapping $false

For details: https://learn.microsoft.com/en-us/outlook/troubleshoot/profiles-and-accounts/remove-automapping-for-shared-mailbox

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