Recreate ActiveSync Virtual Directory in Exchange 2013 and 2016 (Default Web Site) and (Exchange Back End)

This article describes how to recreate the Activesync virtual directory on Exchange Server 2013 and Exchange Server 2016. Recreating of this virtual directories helps to reset all settings. It can solve many problems relating to incorrect operation of smartphone ActiveSync access: various mobile outlook errors, permission problems, Outlook connectivity issues etc.

Note that the virtual directories are required to access Exchange services from web-based applications (such as Outlook Web App (OWA), Exchange Active Sync, Autodiscover). You can manage them in 3 places: EAC, EMS & IIS Manager.

In Exchange 2013, the Mailbox and Client Access roles can be installed on separate servers. Therefore, on the Mailbox server, virtual directories are located on the ExchangeBackEnd site (listening TCP ports 81, 444). In contrast, on the CAS server, the virtual directories are found on the DefaultWebSite site (listening TCP ports 80, 443).

In Exchange 2016, the Mailbox and Client Access roles are consolidated (separated CAS role was eliminated). Therefore, on the Mailbox server, virtual directories are located in on the same server in these two sites:

·        DefaultWebSite site (listening TCP ports 80, 443)

·        ExchangeBackEnd site (listening TCP ports 81, 444)

The example above shows the Exchange 2016 Server with both the Default Web site and Exchange Back End

Note: Run these commands in the appropriate servers where the IIS sites are located.

Our tasks below are based on Exchange 2016, and we will be using the Exchange Management Shell.

1.                First, we need to determine the full name of the virtual directory on which the problems observed. In our chase, it is the Activesync the Exchange organisation:


In our example, the name of the directory – Microsoft-Server-Activesync (Default Web Site)

2.                Display and remember the virtual directory setting (ExternalURL, InternalURL, authentication settings):

Get-ActivesyncVirtualDirectory “Exchangeservername\Microsoft-Server-ActiveSync (Default Web Site)”|select-object InternalUrl, ExternalUrl, BasicAuthentication, WindowsAuthentication, DigestAuthentication, FormsAuthentication

3.                Delete the Activesync directory.

Remove-ActiveSyncVirtualDirectory -Identity “Microsoft-Server-ActiveSync (Default Web Site)”

Press Y and press Enter to confirm.


4.                Create a new Activesync directory

New-ActiveSyncVirtualDirectory -WebSiteName "Default Web Site" -ExternalUrl https://FQDN/Microsoft-Server-ActiveSync -InternalUrl https://FQDN/Microsoft-Server-ActiveSync 


5.                Remove the Site in Back End

Remove-ActiveSyncVirtualDirectory -Identity “Server Name\Microsoft-Server-ActiveSync (Exchange Back End)”

6.                Recreate the Site in Back End

New-ActiveSyncVirtualDirectory -WebSiteName "Exchange Back End"

That’s it!

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