SSL Checker

If you wanted to verify any website by this tool, SSL certificate is correctly installed, valid and signed. You can view additional information about SSL certificate including issuer, expiration dater, algorythm and covered subdomains.

Use our fast SSL Checker to help you quickly diagnose problems with your SSL certificate installation. You can verify the SSL certificate on your web server to make sure it is correctly installed, valid, trusted and doesn't give any errors to any of your users.

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SSL information
Domain portal.office.com
Issuer Microsoft TLS G2 RSA CA OCSP 10 (Microsoft Corporation)
Algorithm RSA-SHA384
Valid from 17-Feb-2026
Expiration 12-Feb-2027
Signed Certificate is not self signed
Additional Domains
portal.office.com
portal.microsoftonline.com
portalprv.microsoftonline.com
ncuportalprv.office.com
office.com
portal.microsoft.com
home.office.com
portal-sdf.office.com
prod.msocdn.com
www.office.com
*.portal.office.com
*.www.office.com
admin.microsoft.com
admin.microsoft365.com
www.microsoft365.com
ntp.www.office.com
fluid.office.com
microsoft365.com
word.office.com
excel.office.com
powerpoint.office.com
visio.office.com
apps.office.com
stream.office.com
portal.office365.com
m365.go.microsoft
m365.cloud.microsoft