Azure Certificate Authority details

Article
02/29/2024

This article provides the details of the root and subordinate Certificate Authorities (CAs) utilized by Azure. The scope includes government and national clouds. The minimum requirements for public key encryption and signature algorithms, links to certificate downloads and revocation lists, and information about key concepts are provided below the CA details tables. The host names for the URIs that should be added to your firewall allowlists are also provided.

Certificate Authority details

Any entity trying to access Microsoft Entra identity services via the TLS/SSL protocols will be presented with certificates from the CAs listed in this article. Different services may use different root or intermediate CAs. The following root and subordinate CAs are relevant to entities that use certificate pinning.

How to read the certificate details:

The Serial Number (top string in the table) contains the hexadecimal value of the certificate serial number.
The Thumbprint (bottom string in the table) is the SHA1 thumbprint.
CAs listed in italics are the most recently added CAs.

Root and Subordinate CAs list
Certificate Authority chains

Root Certificate Authorities

Certificate Authority	Serial Number / Thumbprint
Baltimore CyberTrust Root	0x20000b9 D4DE20D05E66FC53FE1A50882C78DB2852CAE474
DigiCert Global Root CA	0x083be056904246b1a1756ac95991c74a A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436
DigiCert Global Root G2	0x033af1e6a711a9a0bb2864b11d09fae5 DF3C24F9BFD666761B268073FE06D1CC8D4F82A4
DigiCert Global Root G3	0x055556bcf25ea43535c3a40fd5ab4572 7E04DE896A3E666D00E687D33FFAD93BE83D349E
Microsoft ECC Root Certificate Authority 2017	0x66f23daf87de8bb14aea0c573101c2ec 999A64C37FF47D9FAB95F14769891460EEC4C3C5
Microsoft RSA Root Certificate Authority 2017	0x1ed397095fd8b4b347701eaabe7f45b3 73a5e64a3bff8316ff0edccc618a906e4eae4d74

Subordinate Certificate Authorities

Certificate Authority	Serial Number Thumbprint
DigiCert Basic RSA CN CA G2	0x02f7e1f982bad009aff47dc95741b2f6 4D1FA5D1FB1AC3917C08E43F65015E6AEA571179
DigiCert Cloud Services CA-1	0x019ec1c6bd3f597bb20c3338e551d877 81B68D6CD2F221F8F534E677523BB236BBA1DC56
DigiCert SHA2 Secure Server CA	0x02742eaa17ca8e21c717bb1ffcfd0ca0 626D44E704D1CEABE3BF0D53397464AC8080142C
DigiCert TLS Hybrid ECC SHA384 2020 CA1	0x0a275fe704d6eecb23d5cd5b4b1a4e04 51E39A8BDB08878C52D6186588A0FA266A69CF28
DigiCert TLS RSA SHA256 2020 CA1	0x06d8d904d5584346f68a2fa754227ec4 1C58A3A8518E8759BF075B76B750D4F2DF264FCD
GeoTrust Global TLS RSA4096 SHA256 2022 CA1	0x0f622f6f21c2ff5d521f723a1d47d62d 7E6DB7B7584D8CF2003E0931E6CFC41A3A62D3DF
Microsoft Azure ECC TLS Issuing CA 01	0x09dc42a5f574ff3a389ee06d5d4de440 92503D0D74A7D3708197B6EE13082D52117A6AB0
Microsoft Azure ECC TLS Issuing CA 01	0x330000001aa9564f44321c54b900000000001a CDA57423EC5E7192901CA1BF6169DBE48E8D1268
Microsoft Azure ECC TLS Issuing CA 02	0x0e8dbe5ea610e6cbb569c736f6d7004b 1E981CCDDC69102A45C6693EE84389C3CF2329F1
Microsoft Azure ECC TLS Issuing CA 02	0x330000001b498d6736ed5612c200000000001b 489FF5765030EB28342477693EB183A4DED4D2A6
Microsoft Azure ECC TLS Issuing CA 03	0x01529ee8368f0b5d72ba433e2d8ea62d 56D955C849887874AA1767810366D90ADF6C8536
Microsoft Azure ECC TLS Issuing CA 03	0x330000003322a2579b5e698bcc000000000033 91503BE7BF74E2A10AA078B48B71C3477175FEC3
Microsoft Azure ECC TLS Issuing CA 04	0x02393d48d702425a7cb41c000b0ed7ca FB73FDC24F06998E070A06B6AFC78FDF2A155B25
Microsoft Azure ECC TLS Issuing CA 04	0x33000000322164aedab61f509d000000000032 406E3B38EFF35A727F276FE993590B70F8224AED
Microsoft Azure ECC TLS Issuing CA 05	0x0ce59c30fd7a83532e2d0146b332f965 C6363570AF8303CDF31C1D5AD81E19DBFE172531
Microsoft Azure ECC TLS Issuing CA 05	0x330000001cc0d2a3cd78cf2c1000000000001c 4C15BC8D7AA5089A84F2AC4750F040D064040CD4
Microsoft Azure ECC TLS Issuing CA 06	0x066e79cd7624c63130c77abeb6a8bb94 7365ADAEDFEA4909C1BAADBAB68719AD0C381163
Microsoft Azure ECC TLS Issuing CA 06	0x330000001d0913c309da3f05a600000000001d DFEB65E575D03D0CC59FD60066C6D39421E65483
Microsoft Azure ECC TLS Issuing CA 07	0x0f1f157582cdcd33734bdc5fcd941a33 3BE6CA5856E3B9709056DA51F32CBC8970A83E28
Microsoft Azure ECC TLS Issuing CA 07	0x3300000034c732435db22a0a2b000000000034 AB3490B7E37B3A8A1E715036522AB42652C3CFFE
Microsoft Azure ECC TLS Issuing CA 08	0x0ef2e5d83681520255e92c608fbc2ff4 716DF84638AC8E6EEBE64416C8DD38C2A25F6630
Microsoft Azure ECC TLS Issuing CA 08	0x3300000031526979844798bbb8000000000031 CF33D5A1C2F0355B207FCE940026E6C1580067FD
Microsoft Azure RSA TLS Issuing CA 03	0x05196526449a5e3d1a38748f5dcfebcc F9388EA2C9B7D632B66A2B0B406DF1D37D3901F6
Microsoft Azure RSA TLS Issuing CA 03	0x330000003968ea517d8a7e30ce000000000039 37461AACFA5970F7F2D2BAC5A659B53B72541C68
Microsoft Azure RSA TLS Issuing CA 04	0x09f96ec295555f24749eaf1e5dced49d BE68D0ADAA2345B48E507320B695D386080E5B25
Microsoft Azure RSA TLS Issuing CA 04	0x330000003cd7cb44ee579961d000000000003c 7304022CA8A9FF7E3E0C1242E0110E643822C45E
Microsoft Azure RSA TLS Issuing CA 07	0x0a43a9509b01352f899579ec7208ba50 3382517058A0C20228D598EE7501B61256A76442
Microsoft Azure RSA TLS Issuing CA 07	0x330000003bf980b0c83783431700000000003b 0E5F41B697DAADD808BF55AD080350A2A5DFCA93
Microsoft Azure RSA TLS Issuing CA 08	0x0efb7e547edf0ff1069aee57696d7ba0 31600991ED5FEC63D355A5484A6DCC787EAD89BC
Microsoft Azure RSA TLS Issuing CA 08	0x330000003a5dc2ffc321c16d9b00000000003a 512C8F3FB71EDACF7ADA490402E710B10C73026E
Microsoft Azure TLS Issuing CA 01	0x0aafa6c5ca63c45141ea3be1f7c75317 2F2877C5D778C31E0F29C7E371DF5471BD673173
Microsoft Azure TLS Issuing CA 01	0x1dbe9496f3db8b8de700000000001d B9ED88EB05C15C79639493016200FDAB08137AF3
Microsoft Azure TLS Issuing CA 02	0x0c6ae97cced599838690a00a9ea53214 E7EEA674CA718E3BEFD90858E09F8372AD0AE2AA
Microsoft Azure TLS Issuing CA 02	0x330000001ec6749f058517b4d000000000001e C5FB956A0E7672E9857B402008E7CCAD031F9B08
Microsoft Azure TLS Issuing CA 05	0x0d7bede97d8209967a52631b8bdd18bd 6C3AF02E7F269AA73AFD0EFF2A88A4A1F04ED1E5
Microsoft Azure TLS Issuing CA 05	0x330000001f9f1fa2043bc28db900000000001f 56F1CA470BB94E274B516A330494C792C419CF87
Microsoft Azure TLS Issuing CA 06	0x02e79171fb8021e93fe2d983834c50c0 30E01761AB97E59A06B41EF20AF6F2DE7EF4F7B0
Microsoft Azure TLS Issuing CA 06	0x3300000020a2f1491a37fbd31f000000000020 8F1FD57F27C828D7BE29743B4D02CD7E6E5F43E6
Microsoft ECC TLS Issuing AOC CA 01	0x33000000282bfd23e7d1add707000000000028 30ab5c33eb4b77d4cbff00a11ee0a7507d9dd316
Microsoft ECC TLS Issuing AOC CA 02	0x33000000290f8a6222ef6a5695000000000029 3709cd92105d074349d00ea8327f7d5303d729c8
Microsoft ECC TLS Issuing EOC CA 01	0x330000002a2d006485fdacbfeb00000000002a 5fa13b879b2ad1b12e69d476e6cad90d01013b46
Microsoft ECC TLS Issuing EOC CA 02	0x330000002be6902838672b667900000000002b 58a1d8b1056571d32be6a7c77ed27f73081d6e7a
Microsoft RSA TLS CA 01	0x0f14965f202069994fd5c7ac788941e2 703D7A8F0EBF55AAA59F98EAF4A206004EB2516A
Microsoft RSA TLS CA 02	0x0fa74722c53d88c80f589efb1f9d4a3a B0C2D2D13CDD56CDAA6AB6E2C04440BE4A429C75
Microsoft RSA TLS Issuing AOC CA 01	0x330000002ffaf06f6697e2469c00000000002f 4697fdbed95739b457b347056f8f16a975baf8ee
Microsoft RSA TLS Issuing AOC CA 02	0x3300000030c756cc88f5c1e7eb000000000030 90ed2e9cb40d0cb49a20651033086b1ea2f76e0e
Microsoft RSA TLS Issuing EOC CA 01	0x33000000310c4914b18c8f339a000000000031 a04d3750debfccf1259d553dbec33162c6b42737
Microsoft RSA TLS Issuing EOC CA 02	0x3300000032444d7521341496a9000000000032 697c6404399cc4e7bb3c0d4a8328b71dd3205563

Root and subordinate certificate authority chains

Certificate Authority	Serial Number Thumbprint
Baltimore CyberTrust Root	020000b9 d4de20d05e66fc53fe1a50882c78db2852cae474
└ Microsoft RSA TLS CA 01	0x0f14965f202069994fd5c7ac788941e2 703D7A8F0EBF55AAA59F98EAF4A206004EB2516A
└ Microsoft RSA TLS CA 02	0x0fa74722c53d88c80f589efb1f9d4a3a B0C2D2D13CDD56CDAA6AB6E2C04440BE4A429C75
DigiCert Global Root CA	0x083be056904246b1a1756ac95991c74a A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436
└ DigiCert Basic RSA CN CA G2	0x02f7e1f982bad009aff47dc95741b2f6 4D1FA5D1FB1AC3917C08E43F65015E6AEA571179
└ DigiCert Cloud Services CA-1	0x019ec1c6bd3f597bb20c3338e551d877 81B68D6CD2F221F8F534E677523BB236BBA1DC56
└ DigiCert SHA2 Secure Server CA	0x02742eaa17ca8e21c717bb1ffcfd0ca0 626D44E704D1CEABE3BF0D53397464AC8080142C
└ DigiCert TLS Hybrid ECC SHA384 2020 CA1	0x0a275fe704d6eecb23d5cd5b4b1a4e04 51E39A8BDB08878C52D6186588A0FA266A69CF28
└ DigiCert TLS RSA SHA256 2020 CA1	0x06d8d904d5584346f68a2fa754227ec4 1C58A3A8518E8759BF075B76B750D4F2DF264FCD
└ GeoTrust Global TLS RSA4096 SHA256 2022 CA1	0x0f622f6f21c2ff5d521f723a1d47d62d 7E6DB7B7584D8CF2003E0931E6CFC41A3A62D3DF
DigiCert Global Root G2	0x033af1e6a711a9a0bb2864b11d09fae5 DF3C24F9BFD666761B268073FE06D1CC8D4F82A4
└ Microsoft Azure TLS Issuing CA 01	0x0aafa6c5ca63c45141ea3be1f7c75317 2F2877C5D778C31E0F29C7E371DF5471BD673173
└ Microsoft Azure TLS Issuing CA 02	0x0c6ae97cced599838690a00a9ea53214 E7EEA674CA718E3BEFD90858E09F8372AD0AE2AA
└ Microsoft Azure RSA TLS Issuing CA 03	0x05196526449a5e3d1a38748f5dcfebcc F9388EA2C9B7D632B66A2B0B406DF1D37D3901F6
└ Microsoft Azure RSA TLS Issuing CA 04	0x09f96ec295555f24749eaf1e5dced49d BE68D0ADAA2345B48E507320B695D386080E5B25
└ Microsoft Azure RSA TLS Issuing CA 07	0x0a43a9509b01352f899579ec7208ba50 3382517058A0C20228D598EE7501B61256A76442
└ Microsoft Azure RSA TLS Issuing CA 08	0x0efb7e547edf0ff1069aee57696d7ba0 31600991ED5FEC63D355A5484A6DCC787EAD89BC
└ Microsoft Azure TLS Issuing CA 05	0x0d7bede97d8209967a52631b8bdd18bd 6C3AF02E7F269AA73AFD0EFF2A88A4A1F04ED1E5
└ Microsoft Azure TLS Issuing CA 06	0x02e79171fb8021e93fe2d983834c50c0 30E01761AB97E59A06B41EF20AF6F2DE7EF4F7B0
DigiCert Global Root G3	0x055556bcf25ea43535c3a40fd5ab4572 7E04DE896A3E666D00E687D33FFAD93BE83D349E
└ Microsoft Azure ECC TLS Issuing CA 01	0x09dc42a5f574ff3a389ee06d5d4de440 92503D0D74A7D3708197B6EE13082D52117A6AB0
└ Microsoft Azure ECC TLS Issuing CA 02	0x0e8dbe5ea610e6cbb569c736f6d7004b 1E981CCDDC69102A45C6693EE84389C3CF2329F1
└ Microsoft Azure ECC TLS Issuing CA 03	0x01529ee8368f0b5d72ba433e2d8ea62d 56D955C849887874AA1767810366D90ADF6C8536
└ Microsoft Azure ECC TLS Issuing CA 04	0x02393d48d702425a7cb41c000b0ed7ca FB73FDC24F06998E070A06B6AFC78FDF2A155B25
└ Microsoft Azure ECC TLS Issuing CA 05	0x0ce59c30fd7a83532e2d0146b332f965 C6363570AF8303CDF31C1D5AD81E19DBFE172531
└ Microsoft Azure ECC TLS Issuing CA 06	0x066e79cd7624c63130c77abeb6a8bb94 7365ADAEDFEA4909C1BAADBAB68719AD0C381163
└ Microsoft Azure ECC TLS Issuing CA 07	0x0f1f157582cdcd33734bdc5fcd941a33 3BE6CA5856E3B9709056DA51F32CBC8970A83E28
└ Microsoft Azure ECC TLS Issuing CA 08	0x0ef2e5d83681520255e92c608fbc2ff4 716DF84638AC8E6EEBE64416C8DD38C2A25F6630
Microsoft ECC Root Certificate Authority 2017	0x66f23daf87de8bb14aea0c573101c2ec 999A64C37FF47D9FAB95F14769891460EEC4C3C5
└ Microsoft Azure ECC TLS Issuing CA 01	0x330000001aa9564f44321c54b900000000001a CDA57423EC5E7192901CA1BF6169DBE48E8D1268
└ Microsoft Azure ECC TLS Issuing CA 02	0x330000001b498d6736ed5612c200000000001b 489FF5765030EB28342477693EB183A4DED4D2A6
└ Microsoft Azure ECC TLS Issuing CA 03	0x330000003322a2579b5e698bcc000000000033 91503BE7BF74E2A10AA078B48B71C3477175FEC3
└ Microsoft Azure ECC TLS Issuing CA 04	0x33000000322164aedab61f509d000000000032 406E3B38EFF35A727F276FE993590B70F8224AED
└ Microsoft Azure ECC TLS Issuing CA 05	0x330000001cc0d2a3cd78cf2c1000000000001c 4C15BC8D7AA5089A84F2AC4750F040D064040CD4
└ Microsoft Azure ECC TLS Issuing CA 06	0x330000001d0913c309da3f05a600000000001d DFEB65E575D03D0CC59FD60066C6D39421E65483
└ Microsoft Azure ECC TLS Issuing CA 07	0x3300000034c732435db22a0a2b000000000034 AB3490B7E37B3A8A1E715036522AB42652C3CFFE
└ Microsoft Azure ECC TLS Issuing CA 08	0x3300000031526979844798bbb8000000000031 CF33D5A1C2F0355B207FCE940026E6C1580067FD
└ Microsoft ECC TLS Issuing AOC CA 01	33000000282bfd23e7d1add707000000000028 30ab5c33eb4b77d4cbff00a11ee0a7507d9dd316
└ Microsoft ECC TLS Issuing AOC CA 02	33000000290f8a6222ef6a5695000000000029 3709cd92105d074349d00ea8327f7d5303d729c8
└ Microsoft ECC TLS Issuing EOC CA 01	330000002a2d006485fdacbfeb00000000002a 5fa13b879b2ad1b12e69d476e6cad90d01013b46
└ Microsoft ECC TLS Issuing EOC CA 02	330000002be6902838672b667900000000002b 58a1d8b1056571d32be6a7c77ed27f73081d6e7a
Microsoft RSA Root Certificate Authority 2017	0x1ed397095fd8b4b347701eaabe7f45b3 73A5E64A3BFF8316FF0EDCCC618A906E4EAE4D74
└ Microsoft Azure RSA TLS Issuing CA 03	0x330000003968ea517d8a7e30ce000000000039 37461AACFA5970F7F2D2BAC5A659B53B72541C68
└ Microsoft Azure RSA TLS Issuing CA 04	0x330000003cd7cb44ee579961d000000000003c 7304022CA8A9FF7E3E0C1242E0110E643822C45E
└ Microsoft Azure RSA TLS Issuing CA 07	0x330000003bf980b0c83783431700000000003b 0E5F41B697DAADD808BF55AD080350A2A5DFCA93
└ Microsoft Azure RSA TLS Issuing CA 08	0x330000003a5dc2ffc321c16d9b00000000003a 512C8F3FB71EDACF7ADA490402E710B10C73026E
└ Microsoft Azure TLS Issuing CA 01	0x1dbe9496f3db8b8de700000000001d B9ED88EB05C15C79639493016200FDAB08137AF3
└ Microsoft Azure TLS Issuing CA 02	0x330000001ec6749f058517b4d000000000001e C5FB956A0E7672E9857B402008E7CCAD031F9B08
└ Microsoft Azure TLS Issuing CA 05	0x330000001f9f1fa2043bc28db900000000001f 56F1CA470BB94E274B516A330494C792C419CF87
└ Microsoft Azure TLS Issuing CA 06	0x3300000020a2f1491a37fbd31f000000000020 8F1FD57F27C828D7BE29743B4D02CD7E6E5F43E6
└ Microsoft RSA TLS Issuing AOC CA 01	330000002ffaf06f6697e2469c00000000002f 4697fdbed95739b457b347056f8f16a975baf8ee
└ Microsoft RSA TLS Issuing AOC CA 02	3300000030c756cc88f5c1e7eb000000000030 90ed2e9cb40d0cb49a20651033086b1ea2f76e0e
└ Microsoft RSA TLS Issuing EOC CA 01	33000000310c4914b18c8f339a000000000031 a04d3750debfccf1259d553dbec33162c6b42737
└ Microsoft RSA TLS Issuing EOC CA 02	3300000032444d7521341496a9000000000032 697c6404399cc4e7bb3c0d4a8328b71dd3205563

Client compatibility for public PKIs

The CAs used by Azure are compatible with the following OS versions:

Windows	Firefox	iOS	macOS	Android	Java
Windows XP SP3+	Firefox 32+	iOS 7+	OS X Mavericks (10.9)+	Android SDK 5.x+	Java JRE 1.8.0_101+

Review the following action steps when CAs expire or change:

Update to a supported version of the required OS.
If you can't change the OS version, you may need to manually update the trusted root store to include the new CAs. Refer to documentation provided by the manufacturer.
If your scenario includes disabling the trusted root store or running the Windows client in disconnected environments, ensure that all root CAs are included in the Trusted Root CA store and all sub CAs listed in this article are included in the Intermediate CA store.
Many distributions of Linux require you to add CAs to /etc/ssl/certs. Refer to the distribution’s documentation.
Ensure that the Java key store contains the CAs listed in this article. For more information, see the Java applications section of this article.
If your application explicitly specifies a list of acceptable CAs, check to see if you need to update the pinned certificates when CAs change or expire. For more information, see Certificate pinning.

Public key encryption and signature algorithms

Support for the following algorithms, elliptical curves, and key sizes are required:

Signature algorithms:

ES256
ES384
ES512
RS256
RS384
RS512

Elliptical curves:

P256
P384
P521

Key sizes:

ECDSA 256
ECDSA 384
ECDSA 521
RSA 2048
RSA 3072
RSA 4096

Certificate downloads and revocation lists

The following domains may need to be included in your firewall allowlists to optimize connectivity:

AIA:

cacerts.digicert.com
cacerts.digicert.cn
cacerts.geotrust.com
www.microsoft.com

CRL:

crl.microsoft.com
crl3.digicert.com
crl4.digicert.com
crl.digicert.cn
cdp.geotrust.com
mscrl.microsoft.com
www.microsoft.com

OCSP:

ocsp.msocsp.com
ocsp.digicert.com
ocsp.digicert.cn
oneocsp.microsoft.com
status.geotrust.com

Certificate Pinning

Certificate Pinning is a security technique where only authorized, or pinned, certificates are accepted when establishing a secure session. Any attempt to establish a secure session using a different certificate is rejected. Learn about the history and implications of certificate pinning.

How to address certificate pinning

If your application explicitly specifies a list of acceptable CAs, you may periodically need to update pinned certificates when Certificate Authorities change or expire.

To detect certificate pinning, we recommend the taking the following steps:

If you're an application developer, search your source code for references to certificate thumbprints, Subject Distinguished Names, Common Names, serial numbers, public keys, and other certificate properties of any of the Sub CAs involved in this change.
- If there's a match, update the application to include the missing CAs.
If you have an application that integrates with Azure APIs or other Azure services and you're unsure if it uses certificate pinning, check with the application vendor.

Java Applications

To determine if the Microsoft ECC Root Certificate Authority 2017 and Microsoft RSA Root Certificate Authority 2017 root certificates are trusted by your Java application, you can check the list of trusted root certificates used by the Java Virtual Machine (JVM).

Open a terminal window on your system.
Run the following command:
```
keytool -list -keystore $JAVA_HOME/jre/lib/security/cacerts
```
- $JAVA_HOME refers to the path to the Java home directory.
- If you're unsure of the path, you can find it by running the following command:
```
readlink -f $(which java) | xargs dirname | xargs dirname
```
Look for the Microsoft RSA Root Certificate Authority 2017 in the output. It should look something like this:
- If the Microsoft ECC Root Certificate Authority 2017 and Microsoft RSA Root Certificate Authority 2017 root certificates are trusted, they should appear in the list of trusted root certificates used by the JVM.
- If it's not in the list, you'll need to add it.
- The output should look like the following sample:
```
    ...
    Microsoft ECC Root Certificate Authority 2017, 20-Aug-2022, Root CA,
    Microsoft RSA Root Certificate Authority 2017, 20-Aug-2022, Root CA,
    ...
```
To add a root certificate to the trusted root certificate store in Java, you can use the keytool utility. The following example adds the Microsoft RSA Root Certificate Authority 2017 root certificate:
```
keytool -import -file microsoft-ecc-root-ca.crt -alias microsoft-rsa-root-ca -keystore $JAVA_HOME/jre/lib/security/cacerts
keytool -import -file microsoft-rsa-root-ca.crt -alias microsoft-rsa-root-ca -keystore $JAVA_HOME/jre/lib/security/cacerts
```
Note

In this example, microsoft-ecc-root-ca.crt and microsoft-rsa-root-ca.crt are the names of the files that contain the Microsoft ECC Root Certificate Authority 2017 and Microsoft RSA Root Certificate Authority 2017 root certificates, respectively.

Past changes

The CA/Browser Forum updated the Baseline Requirements to require all publicly trusted Public Key Infrastructures (PKIs) to end usage of the SHA-1 hash algorithms for Online Certificate Standard Protocol (OCSP) on May 31, 2022. Microsoft updated all remaining OCSP Responders that used the SHA-1 hash algorithm to use the SHA-256 hash algorithm. View the Sunset for SHA-1 OCSP signing article for additional information.

Microsoft updated Azure services to use TLS certificates from a different set of Root Certificate Authorities (CAs) on February 15, 2021, to comply with changes set forth by the CA/Browser Forum Baseline Requirements. Some services finalized these updates in 2022. View the Azure TLS certificate changes article for additional information.

Article change log

July 17, 2023: Added 16 new subordinate Certificate Authorities
February 7, 2023: Added eight new subordinate Certificate Authorities

Next steps

To learn more about Certificate Authorities and PKI, see: