Hi everyone,

We are using Exchange Server 2013 on Windows server 2012 R2, we need to disable the Open Another Mailbox for particular users in OWA as well as in Outlook. Kindly anyone help me on this.

You need to create a new OWA Mailbox policy with the 'ExplicitLogonEnabled' parameter disabled and assign it to that user. Here's the cmdlet help: https://technet.microsoft.com/en-us/library/dd297989(v=exchg.150).aspx

• Proposed as answer by PK M Sunday, February 08, 2015 11:24 AM

You need to create a new OWA Mailbox policy with the 'ExplicitLogonEnabled' parameter disabled and assign it to that user. Here's the cmdlet help: https://technet.microsoft.com/en-us/library/dd297989(v=exchg.150).aspx

• Proposed as answer by PK M Sunday, February 08, 2015 11:24 AM

Hi,

Here is the command to create a mailbox policy to disable Open Another Mailbox feature.

New-OwaMailboxPolicy -Name DisableOpenAnotherMailbox

Set-OwaMailboxPolicy DisableOpenAnotherMailbox ExplicitLogonEnabled $false

Note: Changes to Outlook Web App mailbox polices may take up to 60 minutes to take effect. In on-premises Exchange 2013, you can force an update by running the command IISRESET /noforce.

Then assign it to particular users by using the Set-CASMailbox cmdlet in the Shell.

Set-CASMailbox -Identity Username -OwaMailboxPolicy DisableOpenAnotherMailbox

Best Regards.

• Marked as answer by Tamizharasan Tuesday, February 10, 2015 6:23 AM

Hi,

Here is the command to create a mailbox policy to disable Open Another Mailbox feature.

New-OwaMailboxPolicy -Name DisableOpenAnotherMailbox

Set-OwaMailboxPolicy DisableOpenAnotherMailbox ExplicitLogonEnabled $false

Note: Changes to Outlook Web App mailbox polices may take up to 60 minutes to take effect. In on-premises Exchange 2013, you can force an update by running the command IISRESET /noforce.

Then assign it to particular users by using the Set-CASMailbox cmdlet in the Shell.

Set-CASMailbox -Identity Username -OwaMailboxPolicy DisableOpenAnotherMailbox

Best Regards.

• Marked as answer by Tamizharasan 5 hours 27 minutes ago

Thanks for your reply Vasil and Lynn. Its working.

How did you get it to work? For me its not working even after forcing iisreset. I can still open other mailbox in OWA 2013.

Regards,

Irfan