Missing root certificates

This policy setting controls how Outlook functions when a root certificate is missing.

If you enable this policy setting, you can choose from three options that determine how Outlook functions when a root certificate is missing.

- Neither Error nor Warning. This option displays neither an error nor a warning, and enforces the default configuration in Outlook.
- Warning. This option ensures that Outlook displays a warning message when a root certificate is missing.
- Error. This option ensures that Outlook displays an error message when a root certificate is missing.

If you don't configure this policy setting, users will see an error when a root certificate is missing.

Indicate a missing root certificate as a(n):

0. Neither error nor warning
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\outlook\security
   Value Name	sigstatusnotrustdecision
   Value Type	REG_DWORD
   Value	0

1. Warning
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\outlook\security
   Value Name	sigstatusnotrustdecision
   Value Type	REG_DWORD
   Value	1

2. Error
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\outlook\security
   Value Name	sigstatusnotrustdecision
   Value Type	REG_DWORD
   Value	2