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Entitlement.diagnostics.office.com Certificate Error [Fix]
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Updated onOctober 4, 2023
updated onOctober 4, 2023
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Are you trying to open Outlook in Office 365 and you encounter theentitlement.diagnostics.office.comcertificate error?
The issue may also occur when you try to create a new profile or while the Outlook client is running.
While there could be different reasons whyOutlook won’t open, it may also pop up when the old domain name is still unchanged, or due to the wrong hostname.
Fortunately, there are a few solutions that may help you fix the entitlement.diagnostics.office.com error for the users in your Organization.
Before we move over to the solutions, let’s understand what is diagnostic data in Office 365.
What is diagnostic data in Office 365?
Microsoft collects diagnostic data as you use Office 365 and OneDrive to keep your app secure and improve its performance. At the same time, it offers a more personalized experience.
The collection of some data is essential for the proper functioning of Office 365 products. But it does not allow you to fully disable the tracking.
The data does not include your name, email, or any other information that’s not related to Office 365 or OneDrive. Moreover, it does not affect your ability to use the software either.
The good thing is, thatMicrosoft 365 lets you control your Windows diagnostic data. This helps you to review and check your privacy settings directly from any Office 365 application.
Do not hesitate to read the FAQs in the Account Privacy section to know more about the Office data collection. You can then enable or disable the settings.
Besides, you may also visit the Microsoft Support page to know more aboutDiagnostic data and how to access and choose your diagnostic data settings.
The entitlement.diagnostics.office.com error is a type of Required Diagnostic data. It checks the entitlement of the Office 365 app you are using.
So, when the certificate is missing, you bump into the error. If you wondering how to fix the Outlook certificate error, follow the below methods.
How do I get rid of certificate errors in Office?
1. Verify the certificate name
But if the certificate has different names, you can try each hostname. If none of them is the correct one, get the correct mail server from your Internet Service Provider.
Once you have successfully verified the certificate name, the entitlement.diagnostics.office.com certificate error should not pop up anymore.
2. Change the outgoing SMTP port
If the Internet service provider blocks the outgoing SMTP port, you may encounter the Outlook security certificate error.
Therefore, changing the server from the blocked port to some other port may help fix this issue.
3. Use the domain name of your hosting as a mail server
The hosting providers manage a large number of domains. Therefore, in the case of shared hosting, they provide the same server to users for different domains.
This means that the hosting provider does not renew the SSL certificate for every domain.
They only use the domain name certificate. Thus, it triggers the entitlement.diagnostics.office.com security alert.
Hence, it is recommended to use the domain name of the hosting company, and not the domain name of the mail server.
Outlook security alert certificate keeps popping up
Many end-users in an organization receive a security pop-up with the certificate warning message while trying to open Outlook.
The error readsthe name on the security certificate is invalidafter installing Exchange Server 2016.
Another error that you may encounter isThe security certificate was issued by a company you have not chosen to trust.
When you install Exchange Server 2016 into the Active Directory, it also deploys the Service Connection Point (SCP) for the Autodiscover service.
Autodiscover is used by email clients to track and collect data related to the exchange mailboxes and services.
Sometimes, the Autodiscover feature may stop working if the DNS records are configured incorrectly. This is when you may encounter the Autodiscover certificate error on Outlook.
You can visit theMicrosoft support pageto know more aboutThe name on the security certificate is invaliderror.
Alternatively, you can install a valid SSL certificate and check if this helps fix the issue. You can follow our detailed guide on how to install certificates andfix email certificate errors.
Another option is to try and connect your email address to a different email client. We recommend that you tryMailbird, which automatically detects the outgoing server your address is using.
It supports IMAP, POP, SMTP which are the most common Outlook server types. This email client service is very reliable and easy to use. If you pick this option, you will have a smooth transition.
You just have to get the application and log into your email with your credentials. Mailbird gives access to powerful email filtering, scheduling options, and other similar tools that keep you more productive and organized.
⇒Get Mailbird
But if the Outlook security certificate warning keeps popping up on Office 365, do let us know in the comments box below and we will try to find a solution.
More about the topics:certificate error,Office 365,Outlook Errors
Madhuparna Roy
A diploma holder in computers and with a keen interest in technology, Madhuparna is passionate about writing How-to guides and helping people solve the most intricate Windows issues.
It all started with the evolution of mobile phones and Google, and that has now settled with Windows.
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