Category Archives: Outlook

Fix: Outlook blocked access to the following potentially unsafe attachments

When you open a specific attachment in Outlook you might get the error saying Outlook blocked access to the following potentially unsafe attachments. Here’s a some solutions to help you unblock attachments in Outlook

Make sure that Outlook is closed. Open Registry and go to the below area depending on your office application version

Microsoft Office Outlook 2010
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security
Microsoft Office Outlook 2007
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security
Microsoft Office Outlook 2003
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security
Microsoft Outlook 2002
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security
Microsoft Outlook 2000
HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security

Create a new String Value and enter Level1Remove
As the value enter the extension of the file example .pptx, if you want to add multiple extensions, seperate them with a semicolon like this, .pptx;.docx

Close regedit and open Outlook

If this doesn’t work then you might have an update that blocks as Microsoft have released a patch which blocks safe files.

If you do have the below updates according to the Office version, remove them.

Outlook 2007: KB3191898
Outlook 2010: KB3203467
Outlook 2013: KB3191938
Outlook 2016: KB3191932

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Fix: Your automatic reply settings cannot be displayed because the server is unavailable

When setting up the automatic reply and out of office from your Outlook 2010 having Exchange 2010 you might have the problem with a pop-up saying “Your automatic reply settings cannot be displayed because the server is unavailable”.

I have managed to solve this with a DNS record in your infrastructure. Create the following SRV record to fix the issue.

Service: _autodiscover
Protocol: _tcp
Port Number: 443
Host: myexchangeserver.mydomain.local

On the client PC run the following to refresh the DNS. Make sure you run the CMD as Administrator

ipconfig /flushdns
ipconfig /registerdns

This should fix the problem and the user will be prompted to enter his Out of office settings.

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Fix: Cannot open your default e-mail folders in Outlook

When opening Outlook you can be presented with the error Cannot open your default e-mail folders. The information store could not be opened. To fix the issue follow the below steps.

– Close Outlook
– Open C:\Program Files (x86)\Microsoft Office\Office14 folder or the folder where Outlook.exe is located.
– Right click on Outlook.exe and select properties.
– On the Compatibility Mode tab
– Un-tick the option Run this program in compatibility mode.
– Open Outlook

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Fix: Cannot start Microsoft Office Outlook. MAPI32.DLL is corrupt or the wrong version

Usually this happens when you have iether a newer version of Microsoft Office and then you install an older one, you may see this error when opening Outlook.

Cannot start Microsoft Office Outlook. MAPI32.DLL is corrupt or the wrong version. This could have been caused by installing other messaging software. Please reinstall Outlook.

To fix this, do the following:

Open C:\Program Files\Common Files\System\Msmapi\1033
Delete MAPI32.DLL
Rename MSMAPI32.DLL to MAPI32.DLL
Start Outlook

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Fix: Outlook cannot send emails data file cannot be accessed (error 8004010F)

You may notice that all of a sudden you can recieve mails but cannot send. Outlook will popup a message saying ‘Outlook data file cannot be accessed (error 8004010F)‘.

Thou the PST files are there and accessible, the only way to fix this is to re-create your Outlook Profile from the Control Panel by:

Open Control Panel
Open Mail 32-bit
Click on Show Profiles
Select the profile in question
Click Remove

Now open Outlook and reconfigure the account. This should fix the problem

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