Link Exchange Online Mailbox with Exchange On-premise

One of my customer have a hybrid exchange environment.

For a new user needs to create AD account and Mailbox on Exchange on-premise.

After creating mailbox and if is needed (depends on Company Police), user mailbox moving to the Exchange Online (Office 365).

It is important to be sure that the right routing address is set, user listed in Address Book and all works fine.

In this case some mailboxes was created wrong.

That means, that there was a AD user on-premise and mailbox was created directly in the Exchange Online.

 

 

 

When on-premise user tried to send message to user whose mailbox was created in Exchange Online directly, he got message:

 

Exchange: Hide Mailbox from Address List

In organization you might need to hide a mailbox from the GAL for some reason.

For this procedure you may use Exchange Admin Center or the Exchange Management Shell.

Hide mailbox using the Exchange Admin Center:

Select Recipients - Mailboxes

Click edit on the mailbox where you want to hide from the GAL.

 

On the properties page for the user, ensure you are on the General tab/page
Select option "Hide from address lists" then click Save button.

 

 

 

Hide mailbox using the Exchange Management Shell:

 

Set-Mailbox -Identity <UserName> -HiddenFromAddressListsEnabled $true

 

 

To show mailbox using the Exchange Management Shell:

 

Set-Mailbox -Identity <UserName> -HiddenFromAddressListsEnabled $false

 

 

 

 



How to view the version and build number of a Microsoft Exchange Server

Applies to: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016

To view the version and build number of a Microsoft Exchange Server run the following command in the Exchange Management Shell

[PS] Get-ExchangeServer | Format-List Name, Edition, AdminDisplayVersion, ServerRole

But what if you don't have easy access to EMS, or you want to check the version of the Exchange Server your mailbox is hosted?