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.

Guide

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

HKEY_CURRENT_USER\Software\Microsoft\Office16.0\Outlook\Security

Value = OutlookSecureTempFolder

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.

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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:

HKEY_CURRENT_USER\Software\Microsoft\Office15.0\Outlook\Resiliency

Delete the REG_BINARY keys found in DisabledItems and CrashingAddinList folders:

Then navigate to this location:

HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins

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

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

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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;

 %appdata%\Roaming\Microsoft\Outlook  

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.

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