Author: Adam Fowler

Hide ‘Do not forward’ in Outlook

Posted on by Adam Fowler

If you’ve noticed this option in Outlook, you might wonder where it comes from:

On a new/reply email window in Outlook, under the ‘Options’ tab is a button called ‘Permission’ (which in the future based on the time of writing, is changing to be called ‘Security’). This by default has three or four options, which seem to be dependent on the version of Outlook being run (MSI vs CTR). Click To Run has another called ‘Encrypt-Only’ which I haven’t tested yet.

These options are actually using Azure Information Protection (AIP) to encrypt your email. That’s a giant topic in itself, but the one liner is that wherever you send an encrypted email to, needs to sign in to view the message. In some scenarios this works seamlessly, such as sending to an external user also using Exchange Online. In other scenarios they’ll need to click a button to log in and view the email via their browser.

The ‘Tenant name – Confidential’ and ‘Tenant name – Confidential View Only’ are default AIP labels. You can view/edit these by going to your Azure portal and looking under Azure Information Protection > Classifications > Labels. 

As you’ll see in the screenshot above, the two labels I mentioned are listed, and you can go into those and disable them if you don’t want them to appear for your users (there’s a toggle for ‘Enabled’ set to ‘On’, set that to ‘Off’). You could also completely disable Azure Information Protection, but that might cause you other problems if you want to use AIP in any way.

You might be wondering why you’d want to turn these off, encryption and security is good right? You might not be ready for users to start using this yet for support reasons, you might have a different method of securing emails, or you might be using a 3rd party backup system. That backup system won’t be able to read encrypted emails by default – so unless you can get that working somehow, you will only have copies of emails that contain a link to the actual content that require the right access to get to the contents – not a true backup.

Getting back to the title of this article – Do No Forward. If you’re at this stage, you may have noticed that it’s not actually a label listed. As covered in this documentation, it’s inbuilt rather than being a customisable policy, template or tag.

You can turn off this single function in the Azure portal under Azure Information Protection > Policies > Policy: Global and toggling the ‘Add the Do Not Forward button to the Outlook ribbon’ to Off:

There is a registry trick to disable this from Outlook too, which was given to me by Microsoft Support:

Open registry key editor:
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\DRM
14.0 = 2010
15.0 = 2013
16.0 = 2016
2.On the Edit menu, point to New, and then click DWORD (32-bit) Value.

Type DisableDNF, and then press ENTER.

In the Detailspane, right-click DisableDNF, and then click Modify.

In the Value databox, type 1, and then click OK.

Exit Registry Editor.

This will at least grey out the option so it can’t be used. The option will still be usable in Outlook via Web, and if I find a solution to that I’ll update this post. As far as I know at this stage, it can’t be hidden or removed.

Update: It’s possible to hide this in OWA also.

The ‘Encrypt’ or ‘Protect’ button (Right now I see different options in different tenants) can be hidden with this PowerShell command:

Set-IRMConfiguration -SimplifiedClientAccessEnabled $false

Although this hides the option, there’s also a ‘Set Permissions’ menu options in the ellipsis that can be hidden with this PowerShell command:

Get-OwaMailboxPolicy | Set-OwaMailboxPolicy -IRMEnabled $false 

Those two together should stop any user being able to encrypt an email themselves via OWA.

Finally, you could look at completely disabling rights management in all forms on Azure Active directory, which can be done here:

https://account.activedirectory.windowsazure.com/RmsOnline/Manage.aspx?brandContextID=O365

Exchange Online Migration Clears ‘Recent’ Document Lists from Word and Excel

Posted on by Adam Fowler

I struggle to fit these issues into a short but descriptive headline sometimes :)

This issue is a little strange. If you didn’t know any better (like me), you’d expect the location of a user’s mailbox to have no impact whatsoever on the function of ‘Recent’ document history inside of Microsoft Excel and Word, but it actually does.

I found this out the hard way of course, when a couple of staff mentioned their recent lists had disappeared and it co-coincided with their Exchange on-prem to Exchange online migration.

After some digging, I came across this Reddit post: 
Users losing Recent Documents lists in Office 2016 due to upgrade to ADFS. It’s the same problem with a slightly different root cause, and goes into a much deeper technical explanation than what I’ll do here.

The short of it is that the Office applications detect what sort of login you’re using – if it’s Active Directory (AD) or Azure Active Directory (AAD). When that state changes, it uses a different registry path for a few things, including those recent documents.

Without knowing for sure but based on my testing, it must be doing some check to see if the associated account’s mailbox is in Exchange Online or not – and if not, it considers it an AD account. It doesn’t matter if you already have the users in Azure AD, Single Sign on and all that other good stuff set up – the single change of changing the mailbox location to online triggered the change for me.

For an AD account, the history paths are saved in the registry here:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Word\User MRU\AD_1234567890 (the number on the end is some sort of unique GUID).

For an Exch account, it’s in this slightly different path:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Word\User MRU\ADAL_1234567890 (again, unique GUID at the end).

In case you were wondering, MRU stands for ‘Most Recently Used’. AD is to do with on-prem Active Directory, and ADAL is (according to that reddit post) Azure Active Directory Authentication Library.

Also note the example above is for Word, there’s corresponding paths for other Office applications such as Excel.

There’s two subkeys below this key, one for File MRU and the other Place MRU.

The good news on hitting this scenario is that the values can just be exported, the path changed and re-imported. To do this, via regedit find the registry key that has the values you want (probably the AD one) and right click > export.

Find the file you exported and use notepad to do a find and replace on all the entires for AD_1234567890 and replace to the new value (which you can find from just looking in the registry).

Now, re-import the registry file and you’ll have all the recent document paths restored.

This should only be a one time problem for migrations, and only for people who had a bunch of document paths saved in there and can’t find where they are easily.

Disable Windows Defender Summaries via Registry

Posted on by Adam Fowler

Windows Defender does some great stuff, but in my opinion one of the more ‘noisy’ things it does in Windows 10 is provide a frequent notification to say it’s working but hasn’t found anything.

Many users may find this notification unnecessary and breaking their work focus just to be told that their PC is fine. Especially in a business environment, they’d think that is someone else’s problem.

Windows Defender Security Center Settings

A user can turn these off themselves of course, in the Windows Defender Security Settings page under Virus & threat protection notifications. It’s possible to turn off all informational notifications, or untick certain types.

Although there is an inbuilt Group Policy to also turn off informational notifications, to me I’d still want users knowing a threat was found or something was blocked – those are useful to the user. However the recent activity and scan results is the one I’d suggest disabling, but there’s no Group Policy for that.

Luckily this is just a single registry key which I’ve found through using Procmon:


HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender Security Center\Virus and threat protection\

REG_DWORD: SummaryNotificationDisabled

Value: 1 (decimal)

This setting can be rolled out through Group Policy (even as a run once and don’t reapply) if you’d like users to have control over turning the setting on.

Azure AD Sign-in via Google Chrome and Conditional Access

Posted on by Adam Fowler

While testing MFA, Conditional Access and all the other good stuff Azure AD provides, I came across this scenario:

Conditional Access configured to require MFA if the user wasn’t on an Azure AD Hybrid PC, or coming from an internal IP.

User on an Azure AD Hybrid PC, but on an external IP.

User uses Chrome to access a Microsoft resource, and gets challenged despite being on the Azure AD Hybrid PC.

It seems that the sign-in process isn’t aware of the state of the computer when using Chrome- but there is an easy fix: deploy Windows 10 Accounts extensions for Chrome.

This is really easy to do via Group Policy.

  1. If you don’t already have them, get the ADMX Group Policy files for Google Chrome and deploy into your environment
  2. Under User Configuration > Policies > Administrative Templates > Google > Google Chrome > Extensions, configure the policy ‘Configure the list of force-installed apps and extensions’:

3. Change the radio button to enabled, click ‘Show’ and enter the value for the add-in

ppnbnpeolgkicgegkbkbjmhlideopiji;https://clients2.google.com/service/update2/crx

4. Do your normal process of configuring the Group Policy object to target the users you want, run a gpupdate and see the addin silently turn up in Chrome. The only user impact will be a visible Windows logo to the left of the Google Accounts area in the top bar of Chrome.

Peter van de Woude has documented how to do this via registry, so read his post if you want info on how to do that –  as well as how to then deploy via Intune and PowerShell script.

Worth doing if you use Azure AD connect, and highly recommended if you’re using Conditional Access. 

“This page wants to run the following add-on…” won’t go away in Internet Explorer

Posted on by Adam Fowler

In the last few weeks, I found that a lot of users were complaining about IE11 on Windows 10, and the prompt “This page wants to run the following add-on” with the add-on name, and the allow button:

This webpage wants to run the following add-on ‘Adobe Flash Player’ from Microsoft Windows Third Party Application Compon…

However, clicking the ‘Allow’ button, or using the drop down arrow to choose ‘Allow for all sites’ did nothing, and the prompt would show again and again.

I ended up working out this was due to the Add-On List GPO to list IE add-ons that was being used to manage the add-ons I wanted disabled or enabled https://docs.microsoft.com/en-us/internet-explorer/ie11-deploy-guide/enable-and-disable-add-ons-using-administrative-templates-and-group-policy

The policy explicitly states “The ‘Deny all add-ons unless specifically allowed in the Add-on List’ policy setting will still determine whether add-ons not in this list are assumed to be denied.”

However, since a recent update (either Windows 10 1803, or a recent security patch  – unsure which!), anything not listed in the Add-On List was being blocked. 

Adding an update to the list and allowing it with the ‘1’ value fixes the issue for that particular add-in, but it shouldn’t be working this way.

I even tried disabling the Group Policy setting ‘Deny all add-ons unless specifically allowed in the Add-on List’ but that made no difference. That policy also states: ‘If you disable or do not configure this policy setting, users may use Add-on Manager to allow or deny any add-ons that are not included in the ‘Add-on List’ policy setting.’

Something wacky’s going on – if I find out more I’ll update this post, but if you do use the ‘Add-On List’ GPO for Internet Explorer, be aware of this potential issue. You may need to list all your add-ins into the policy to avoid this.

I’ve also updated all my ADMX files for Win10 1803.

Update:

I believe I fixed this by auditing all the IE addins and making sure they were allowed. Somtimes an addin has a prerequisite of another adding being enabled, so you can’t always trust the message you see.