FAQs Outlook Security

FAQs > Outlook Security

🌟 Syncing attendees may make these pop-ups occur more often. If you don't need them synced, uncheck the Attendees box under Sync Options on the Settings tab.

🌟 If you have OGCS set to start on system startup, and have already followed the configuration advice below, try adding a delay (eg. 300 seconds) - it seems it can take a while for Outlook to work out if it has the latest virus definitions or not.

Why am I getting Outlook security pop-ups?

This is a built-in Microsoft feature for Outlook to try and prevent against malware programmatically accessing your Outlook application, address book or contacts.

How can I stop it happening?

Outlook 2007 and newer

These versions provide more flexibility, with several settings to be chosen from under Outlook Options > Trust Center Settings > Programmatic Access:-

Warn...when antivirus is out of date - preferable
- Obviously your AV definitions do actually need to be up to date to prevent pop-ups
Never warn

Outlook Security Trust Center

If these options are disabled, then you may need to start Outlook with administrative privileges.

Outlook for Office 365

Tested: 32-bit Click-To-Run Office running on 64-bit Windows 10

If the above settings still don't prevent the pop-up, directly setting registry keys may also provide a solution. The below was obtained from here and solution confirmed on issue 1264.

Microsoft KnowledgeBase article 3189806 explains the ObjectModelGuard and covers and how to tell if your Office install is an MSI or Click-to-Run - up to and including Outlook 2019.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\WindowsMessagingSubsystem]
"MAPI"="1"

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security]
"AdminSecurityMode"=dword:00000003
"PromptSimpleMAPISend"=dword:00000002

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\Security]
"AdminSecurityMode"=dword:00000003
"PromptOOMSend"=dword:00000002
"promptoomaddressinformationaccess"=dword:00000002
"promptoomaddressbookaccess"=dword:00000002
"PromptSimpleMAPISend"=dword:00000002
"PromptSimpleMAPINameResolve"=dword:00000002
"PromptSimpleMAPIOpenMessage"=dword:00000002

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\16.0\Outlook\Security]
"ObjectModelGuard"=dword:00000002

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Office\16.0\Outlook\Security]
"ObjectModelGuard"=dword:00000002

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Office\16.0\Outlook\Security]
"ObjectModelGuard"=dword:00000002