Outlook Permissions error when opening attachments

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When trying to look at or save Outlook attachments, you may get an error pop up stating that you do not have permissions to save, this is due to the temporary folder that Outlook uses to store attachments when opening them is full.


To fix this issue, you have two options. You could empty the Outlook temporary folder which is stated in the following registry key:


Value = OutlookSecureTempFolder

Outlook Permissions error when opening attachments 1

However, you can also point your Outlook temporary files to a different location should you wish. Just simply change the OutlookSecureTempFolder location and reboot your machine.


If you have any questions or comments on this guide, please feel free to leave a message below and we will try to get back to you as soon as possible.

Enabling inactive Mimecast Outlook Plugin add-in that keeps being unloaded in Outlook

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To enable an inactive add-in that keeps unloading on restart in Outlook you should follow these steps:

First shut down Outlook, then uninstall the software providing the add-in from your machine.

Then go into regedit whilst logged in as the affected user and go to the following location:


Delete the REG_BINARY keys found in DisabledItems and CrashingAddinList folders:

Enabling inactive Mimecast Outlook Plugin add-in that keeps being unloaded in Outlook 2

Then navigate to this location:


Then delete the key (folder) that references the add-in (we are using Mimecast as our example below):

Enabling inactive Mimecast Outlook Plugin add-in that keeps being unloaded in Outlook 3

Reinstall the software that provided the add-in and then restart Outlook. The add-in should now load.


If you have any questions or comments on this guide, please feel free to leave us a message below using our comments system.


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Download To download, simply scroll down towards the bottom of this page and you will see the options for this download. Ensure you select the correct one and click the blue Download button as detailed below: Prerequisites This program requires Microsoft Outlook to be installed. Instructions For full instructions on how to use this script, … Read more

Mimecast Outlook Client 5.4.1263.13520 Released


Mimecast Outlook Client 5.4.1263.13520 Released 4Mimecast have now released version 5.4.1263.13520 of their Outlook Client.

This version of the MSO client now supports the following:

  • Support for the new Australian grid
  • Fixes from previous releases
  • Fixed an issue when replying to a message where the address was formatted as “”Smith, Sarah’ (ssmith@domain.com)'”.
  • Fixed an issue where Archive Folders other than those of the primary mailbox were displayed.
We have tested this version with Outlook being open during the install and although we do not recommend doing this, it does seem to work so long as you restart Outlook at some point to enable the new version to load.

To push this out using SCCM or Group Policy, we recommend using the MSI command below:

msiexec.exe /i “MSOInstall.msi” /qb /norestart

What this will do is to firstly run the installer, then the /qb will show a basic user interface without user interaction, but will stop and show the error if, for example, Outlook is still open. The /norestart is fairly simple – this will ensure that your client machine does not automatically restart itself.

To download the latest version 5.4.1263.13520 of the MSO client, you can click the link below:


Mimecast Outlook Client 5.4.1263.13520 Released 5


If you have any comments on this new release, please use our comments system below.

Importing NK2 file auto-suggest contacts into Outlook 2013

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With older versions of Outlook (up to 2007) a NK2 file was used to store recently used email addresses so that you could then use them when you started to type an email like an auto-suggest system. This was great for users but a nightmare for IT techs as most users assume that these are “contacts” – when we know they are not and are basically stored in a temp file! so in the past IT techs have had to copy over these NK2 files and then tell users to make sure they add these to their actual Outlook contacts (which of course they never do!).

Outlook 2013 does not use this method of storing auto-suggestions in a NK2 file but stores them in the “Suggested Contacts” instead – so simply copying over the NK2 file will no longer work – you have to import it.

So, I have the NK2 file – how do I import it into Outlook 2013?

If you upgrade to Outlook 2013 from an older version, then the NK2 file is automatically imported upon starting Outlook 2013 for the first time so you do not have to worry.

However, if you create a new Outlook mail profile or when using Outlook on a new computer, you should import an existing NK2 file using the following method:

Copy the NK2 file to the following location;


Rename the NK2 file to the same name of your mail profile.

You then need to start Outlook using a command line to import on load. To do this, run the following command:

 outlook.exe /importnk2  

Outlook will then import the NK2 file into the Suggested Contacts folder and you should find that all the old “contacts” are now available when your end user tries to compose an email.


If you have any questions or comments on this guide, please feel free to use our comments system below.

Shared Mailboxes Sent Items in Outlook

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If you are using shared mailboxes in Outlook, then you may find that when someone is sending an email from this mailbox, the sent email is going into the users own Sent Items folder rather than the Sent Items folder within the shared mailbox itself.

This is because there is a delegation registry key that needs to be set to allow the sent email to drop into the shared mailbox.


Please note the part of the registry key that is in bold and red “14.0” – this is the version of Outlook that you are using and must be changed for your version.

The different versions of Outlook are:

  • Outlook 2007 – 12.0
  • Outlook 2010 – 14.0
  • Outlook 2013 – 15.0
  • Outlook 2016 – 16.0

Also note that this must be done logged in as the affected user that you want to amend.


To do this, simply follow the instructions below:

  • Click Start
  • Click Run
  • Type regedit, and then click OK
  • Locate and then click the following registry subkey:
  • HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences
  • On the Edit menu, point to New, and then click DWORD Value
  • Type DelegateSentItemsStyle, and then press Enter
  • Right-click DelegateSentItemsStyle, and then click Modify
  • In the Value data box, type 1, and then click OK
  • Exit Registry Editor and reboot the machine

Once you have rebooted the machine you should then test sending an email from the shared mailbox and you should now see that the email has gone into the correct folder within the shared mailbox itself.


If you have any questions or comments on this, please feel free to use our comments system below.

Outlook Email Signatures Backup and Migration

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We have recently had to rebuild a number of machines and the main issue that our users bring up is the fact that our first line techs keep forgetting to put users Outlook email signatures back. This, infuriates end users nearly as much as not putting back their 500 desktop shortcuts.

Now, we – as Configuration Manager experts, know that they should be using USMT for such tasks but this does not always happen and sometimes is not always the best course of action depending on the reasons behind the need to rebuild a machine. So how can you quickly and easily backup and restore the users email signatures?

First of all, you have to remember to take a copy of them before the machine is formatted, if you don’t, only tools like GetDataBack can help you now! You should go to the following location:


In there are all the HTML, RTF and TXT files that you need to copy – ensure that you copy everything within that folder including any sub folders.

Then you can go ahead and rebuild the machine once you are happy that you have a copy on the network or on an external storage device.

Once the machine is rebuilt, ensure that you have created the users Outlook profile first, then you simply go back to the location as stated above and copy and paste the files and folders back into the location where they once came from.

Now, fire up Outlook and you should notice that the users signatures are now there for them to carry on using.


If you have any questions about the above guide, please feel free to leave a comment and we will try to get back to you as soon as possible.

ShareSentIt Version 1.1 Released

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We are pleased to announce the release of ShareSentIt version 1.1.

Our new product is designed to help Outlook 2013, 2010 and 2007 users who use shared mailboxes in a corporate environment. If you are a regular user of shared mailboxes, you may already be aware that when an email is sent from a shared mailbox, the email goes straight into the Sent Items of the user that has sent the email rather than into the Sent Items of the shared mailbox itself.

ShareSentIt fixes this problem and ensures that all sent email from a shared mailbox goes directly into the shared mailboxes sent items meaning that all other users of the shared mailbox can also see any emails that have been sent from it.


Download ShareSendIt


The product is free and supplied to you in MSI format so that it can be easily installed using products like Configuration Manager, WDS or Group Policy as well as the traditional manual installation.

Configuration Manager Command Line

msiexec.exe /i “ShareSentIt.msi” /q /norestart

Silent Install Command Line

“ShareSentIt.msi” /q /norestart


This product is now compatible with Outlook 2007, 2010, 2013 and 2016. In each download there are three MSI files which will match the version of the Outlook you have – please ensure that you install the correct file.

This fix will also only work is your end user has cached mode turn on for their own mailbox – if the user is not using cached mode then again, this fix will not work

Bug Reporting

If you have any problems with this item then please use our comments system below to leave a comment or click the Help button on the menu bar at the top of this website.


ShareSentIt Version 1.1 Released 6

PAD File

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Update History

8th April 2014 – Added extra MSI files to download for Outlook 2013 and 2007