This policy setting allows you to configure Office 2013 applications to accept expired digital certificates during verification of digital signatures.
If you enable or do not configure this policy setting, Office 2013 applications display digital signatures created with expired certificates as invalid.
If you disable this policy setting, Office 2013 applications treat expired certificates as valid.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | software\policies\microsoft\office\15.0\common\signatures |
| Value Name | ignoreexpiredcert |
| Value Type | REG_DWORD |
| Enabled Value | 0 |
| Disabled Value | 1 |