Email encryption has become very popular generally for emails that include sensitive data and stop email Spam. And encrypting the email in Outlook means it is transformed from the clear text into the jumbled code text. And the email can only be accessed by the recipient who is having the private key utilized for encrypting the mail can decode the message content and read it. But, in some cases while opening the encrypted email the Recipient gets rejected and see the error message: Well, in some cases the error is temporary but for some users, the error continues to appear.  There is no specific reason why the error appears, however after investigation we find out the main reason responsible for the error is related to the Outlook build. Launching with the Outlook build 16.0.8518.1000, Microsoft upgraded the default reserve algorithm from the 3DES to AES256. Therefore, when the user utilizes the Outlook 16.0.8518.1000 build or later delivers the encrypted emails and the recipient tries to open it by utilizing the 3DES only certificate encryption capabilities, the error message appears on their screen. Despite this, another possible reason why you see the error is either you are not having the certificate to decode the email message, or else you both are having the certificate bot require some settings reconfiguration. So, here try the potential solutions that work to get past the error message.

Verify Your Certificate

It is important for you to first confirm whether you are having a certificate for encrypting the email. So here follow the steps to verify if you are having a certificate or not. Open the certificate title and check if it is blank, then click the Settings and you can now select the certificate utilizing the Choose button and then click on OK. If they are blank, then here require buying a new certificate. There are many External Certificate Authorities available you can choose to buy it. But if the certificate is available the try next solution.

Enable the Client Authentication & Secure Email option

Many users confirmed that enabling the option help them to fix the Outlook your digital id name cannot be found error. Follow the steps to do so: Check if the error is fixed or not, but if still unable to decrypt the email, then head to the next solution.

Remove Problematic Senders’ Certificates

There is the possibility that the error occurs due to the problematic sender certificate, so here it is suggested to look for the particular ones and delete them. Here follow the steps to do so: Check if the Outlook Certificate error: Digital ID name cannot be found by the underlying security system is still persisting or fixed.

Delete and Readd Contacts

Try deleting and reading the contacts, this method works for many to solve the error. follow the steps given: Hope the given steps works for you to get past the error but if not then download and the latest Install Root Militarycac *.MSI version and install it. You can download this by searching the militarycac in the browser here click on the dod certs and download the latest Install Root Militarycac *.MSI version. You can also look for the Non-admin version as this works best for the domain environment. And as it is installed right-click and subscribe to EC root and install Certificate and save the settings. Once the steps are completed restart your system. Now check if the error is resolved. This step will help you to add and then correct any cert chain that got damaged and messed and solve the error in your case hopefully.

Tweak Registry

If somehow the error is not yet resolved then here it is suggested to modify the registry entries very carefully and solve the error completely. Follow the steps given to do so Now the given string value will display the OID to the 3DES encryption algorithm. So, these are the solutions that work for you to solve the Your Digital Id Name Cannot Be Found By The Underlying Security Outlook error.

Fix: Outlook Error ‘The Program Used to Create this Object is Outlook’Fix: Cannot Start Microsoft OutlookFix: The Connection to Microsoft Exchange is Unavailable on OutlookFix: Microsoft Word and Outlook 2013 Crashing with ntdll.dll/MSVCR100.dll Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 6Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 65Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 85Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 8Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 79Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 28Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 12Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 94Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 20Your Digital Id Name Cannot Be Found By The Underlying Security System FIXED - 62